The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
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/11.1/sys/dev/aha/aha.c 315812 2017-03-23 06:40:20Z 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         case 5:
  213                 bus_dma_tag_destroy(aha->ccb_dmat);
  214         case 4:
  215                 bus_dmamap_unload(aha->mailbox_dmat, aha->mailbox_dmamap);
  216         case 3:
  217                 bus_dmamem_free(aha->mailbox_dmat, aha->in_boxes,
  218                     aha->mailbox_dmamap);
  219         case 2:
  220                 bus_dma_tag_destroy(aha->buffer_dmat);
  221         case 1:
  222                 bus_dma_tag_destroy(aha->mailbox_dmat);
  223         case 0:
  224                 break;
  225         }
  226         mtx_destroy(&aha->lock);
  227 }
  228 
  229 /*
  230  * Probe the adapter and verify that the card is an Adaptec.
  231  */
  232 int
  233 aha_probe(struct aha_softc* aha)
  234 {
  235         u_int    status;
  236         u_int    intstat;
  237         int      error;
  238         board_id_data_t board_id;
  239 
  240         /*
  241          * See if the three I/O ports look reasonable.
  242          * Touch the minimal number of registers in the
  243          * failure case.
  244          */
  245         status = aha_inb(aha, STATUS_REG);
  246         if ((status == 0) ||
  247             (status & (DIAG_ACTIVE|CMD_REG_BUSY | STATUS_REG_RSVD)) != 0) {
  248                 PRVERB((aha->dev, "status reg test failed %x\n", status));
  249                 return (ENXIO);
  250         }
  251 
  252         intstat = aha_inb(aha, INTSTAT_REG);
  253         if ((intstat & INTSTAT_REG_RSVD) != 0) {
  254                 PRVERB((aha->dev, "Failed Intstat Reg Test\n"));
  255                 return (ENXIO);
  256         }
  257 
  258         /*
  259          * Looking good so far.  Final test is to reset the
  260          * adapter and fetch the board ID and ensure we aren't
  261          * looking at a BusLogic.
  262          */
  263         if ((error = ahareset(aha, /*hard_reset*/TRUE)) != 0) {
  264                 PRVERB((aha->dev, "Failed Reset\n"));
  265                 return (ENXIO);
  266         }
  267 
  268         /*
  269          * Get the board ID.  We use this to see if we're dealing with
  270          * a buslogic card or an aha card (or clone).
  271          */
  272         error = aha_cmd(aha, AOP_INQUIRE_BOARD_ID, NULL, /*parmlen*/0,
  273             (uint8_t*)&board_id, sizeof(board_id), DEFAULT_CMD_TIMEOUT);
  274         if (error != 0) {
  275                 PRVERB((aha->dev, "INQUIRE failed %x\n", error));
  276                 return (ENXIO);
  277         }
  278         aha->fw_major = board_id.firmware_rev_major;
  279         aha->fw_minor = board_id.firmware_rev_minor;
  280         aha->boardid = board_id.board_type;
  281 
  282         /*
  283          * The Buslogic cards have an id of either 0x41 or 0x42.  So
  284          * if those come up in the probe, we test the geometry register
  285          * of the board.  Adaptec boards that are this old will not have
  286          * this register, and return 0xff, while buslogic cards will return
  287          * something different.
  288          *
  289          * It appears that for reasons unknow, for the for the
  290          * aha-1542B cards, we need to wait a little bit before trying
  291          * to read the geometry register.  I picked 10ms since we have
  292          * reports that a for loop to 1000 did the trick, and this
  293          * errs on the side of conservatism.  Besides, no one will
  294          * notice a 10mS delay here, even the 1542B card users :-)
  295          *
  296          * Some compatible cards return 0 here.  Some cards also
  297          * seem to return 0x7f.
  298          *
  299          * XXX I'm not sure how this will impact other cloned cards
  300          *
  301          * This really should be replaced with the esetup command, since
  302          * that appears to be more reliable.  This becomes more and more
  303          * true over time as we discover more cards that don't read the
  304          * geometry register consistently.
  305          */
  306         if (aha->boardid <= 0x42) {
  307                 /* Wait 10ms before reading */
  308                 DELAY(10000);
  309                 status = aha_inb(aha, GEOMETRY_REG);
  310                 if (status != 0xff && status != 0x00 && status != 0x7f) {
  311                         PRVERB((aha->dev, "Geometry Register test failed %#x\n",
  312                                 status));
  313                         return (ENXIO);
  314                 }
  315         }
  316 
  317         return (0);
  318 }
  319 
  320 /*
  321  * Pull the boards setup information and record it in our softc.
  322  */
  323 int
  324 aha_fetch_adapter_info(struct aha_softc *aha)
  325 {
  326         setup_data_t    setup_info;
  327         config_data_t config_data;
  328         uint8_t length_param;
  329         int      error;
  330         struct  aha_extbios extbios;
  331 
  332         switch (aha->boardid) {
  333         case BOARD_1540_16HEAD_BIOS:
  334                 snprintf(aha->model, sizeof(aha->model), "1540 16 head BIOS");
  335                 break;
  336         case BOARD_1540_64HEAD_BIOS:
  337                 snprintf(aha->model, sizeof(aha->model), "1540 64 head BIOS");
  338                 break;
  339         case BOARD_1542:
  340                 snprintf(aha->model, sizeof(aha->model), "1540/1542 64 head BIOS");
  341                 break;
  342         case BOARD_1640:
  343                 snprintf(aha->model, sizeof(aha->model), "1640");
  344                 break;
  345         case BOARD_1740:
  346                 snprintf(aha->model, sizeof(aha->model), "1740A/1742A/1744");
  347                 break;
  348         case BOARD_1542C:
  349                 snprintf(aha->model, sizeof(aha->model), "1542C");
  350                 break;
  351         case BOARD_1542CF:
  352                 snprintf(aha->model, sizeof(aha->model), "1542CF");
  353                 break;
  354         case BOARD_1542CP:
  355                 snprintf(aha->model, sizeof(aha->model), "1542CP");
  356                 break;
  357         default:
  358                 snprintf(aha->model, sizeof(aha->model), "Unknown");
  359                 break;
  360         }
  361         /*
  362          * If we are a new type of 1542 board (anything newer than a 1542C)
  363          * then disable the extended bios so that the
  364          * mailbox interface is unlocked.
  365          * This is also true for the 1542B Version 3.20. First Adaptec
  366          * board that supports >1Gb drives.
  367          * No need to check the extended bios flags as some of the
  368          * extensions that cause us problems are not flagged in that byte.
  369          */
  370         if (PROBABLY_NEW_BOARD(aha->boardid) ||
  371                 (aha->boardid == 0x41
  372                 && aha->fw_major == 0x31 &&
  373                 aha->fw_minor >= 0x34)) {
  374                 error = aha_cmd(aha, AOP_RETURN_EXT_BIOS_INFO, NULL,
  375                     /*paramlen*/0, (u_char *)&extbios, sizeof(extbios),
  376                     DEFAULT_CMD_TIMEOUT);
  377                 if (error != 0) {
  378                         device_printf(aha->dev,
  379                             "AOP_RETURN_EXT_BIOS_INFO - Failed.");
  380                         return (error);
  381                 }
  382                 error = aha_cmd(aha, AOP_MBOX_IF_ENABLE, (uint8_t *)&extbios,
  383                     /*paramlen*/2, NULL, 0, DEFAULT_CMD_TIMEOUT);
  384                 if (error != 0) {
  385                         device_printf(aha->dev, "AOP_MBOX_IF_ENABLE - Failed.");
  386                         return (error);
  387                 }
  388         }
  389         if (aha->boardid < 0x41)
  390                 device_printf(aha->dev, "Warning: aha-1542A won't work.\n");
  391 
  392         aha->max_sg = 17;               /* Need >= 17 to do 64k I/O */
  393         aha->diff_bus = 0;
  394         aha->extended_lun = 0;
  395         aha->extended_trans = 0;
  396         aha->max_ccbs = 16;
  397         /* Determine Sync/Wide/Disc settings */
  398         length_param = sizeof(setup_info);
  399         error = aha_cmd(aha, AOP_INQUIRE_SETUP_INFO, &length_param,
  400             /*paramlen*/1, (uint8_t*)&setup_info, sizeof(setup_info),
  401             DEFAULT_CMD_TIMEOUT);
  402         if (error != 0) {
  403                 device_printf(aha->dev, "aha_fetch_adapter_info - Failed "
  404                     "Get Setup Info\n");
  405                 return (error);
  406         }
  407         if (setup_info.initiate_sync != 0) {
  408                 aha->sync_permitted = ALL_TARGETS;
  409         }
  410         aha->disc_permitted = ALL_TARGETS;
  411 
  412         /* We need as many mailboxes as we can have ccbs */
  413         aha->num_boxes = aha->max_ccbs;
  414 
  415         /* Determine our SCSI ID */
  416         error = aha_cmd(aha, AOP_INQUIRE_CONFIG, NULL, /*parmlen*/0,
  417             (uint8_t*)&config_data, sizeof(config_data), DEFAULT_CMD_TIMEOUT);
  418         if (error != 0) {
  419                 device_printf(aha->dev,
  420                     "aha_fetch_adapter_info - Failed Get Config\n");
  421                 return (error);
  422         }
  423         aha->scsi_id = config_data.scsi_id;
  424         return (0);
  425 }
  426 
  427 /*
  428  * Start the board, ready for normal operation
  429  */
  430 int
  431 aha_init(struct aha_softc* aha)
  432 {
  433         /* Announce the Adapter */
  434         device_printf(aha->dev, "AHA-%s FW Rev. %c.%c (ID=%x) ",
  435             aha->model, aha->fw_major, aha->fw_minor, aha->boardid);
  436 
  437         if (aha->diff_bus != 0)
  438                 printf("Diff ");
  439 
  440         printf("SCSI Host Adapter, SCSI ID %d, %d CCBs\n", aha->scsi_id,
  441             aha->max_ccbs);
  442 
  443         /*
  444          * Create our DMA tags.  These tags define the kinds of device
  445          * accessible memory allocations and memory mappings we will
  446          * need to perform during normal operation.
  447          *
  448          * Unless we need to further restrict the allocation, we rely
  449          * on the restrictions of the parent dmat, hence the common
  450          * use of MAXADDR and MAXSIZE.
  451          */
  452 
  453         /* DMA tag for mapping buffers into device visible space. */
  454         if (bus_dma_tag_create( /* parent       */ aha->parent_dmat,
  455                                 /* alignment    */ 1,
  456                                 /* boundary     */ 0,
  457                                 /* lowaddr      */ BUS_SPACE_MAXADDR,
  458                                 /* highaddr     */ BUS_SPACE_MAXADDR,
  459                                 /* filter       */ NULL,
  460                                 /* filterarg    */ NULL,
  461                                 /* maxsize      */ DFLTPHYS,
  462                                 /* nsegments    */ AHA_NSEG,
  463                                 /* maxsegsz     */ BUS_SPACE_MAXSIZE_24BIT,
  464                                 /* flags        */ BUS_DMA_ALLOCNOW,
  465                                 /* lockfunc     */ busdma_lock_mutex,
  466                                 /* lockarg      */ &aha->lock,
  467                                 &aha->buffer_dmat) != 0) {
  468                 goto error_exit;
  469         }
  470 
  471         aha->init_level++;
  472         /* DMA tag for our mailboxes */
  473         if (bus_dma_tag_create( /* parent       */ aha->parent_dmat,
  474                                 /* alignment    */ 1,
  475                                 /* boundary     */ 0,
  476                                 /* lowaddr      */ BUS_SPACE_MAXADDR,
  477                                 /* highaddr     */ BUS_SPACE_MAXADDR,
  478                                 /* filter       */ NULL,
  479                                 /* filterarg    */ NULL,
  480                                 /* maxsize      */ aha->num_boxes *
  481                                                    (sizeof(aha_mbox_in_t) +
  482                                                     sizeof(aha_mbox_out_t)),
  483                                 /* nsegments    */ 1,
  484                                 /* maxsegsz     */ BUS_SPACE_MAXSIZE_24BIT,
  485                                 /* flags        */ 0,
  486                                 /* lockfunc     */ NULL,
  487                                 /* lockarg      */ NULL,
  488                                 &aha->mailbox_dmat) != 0) {
  489                 goto error_exit;
  490         }
  491 
  492         aha->init_level++;
  493 
  494         /* Allocation for our mailboxes */
  495         if (bus_dmamem_alloc(aha->mailbox_dmat, (void **)&aha->out_boxes,
  496             BUS_DMA_NOWAIT, &aha->mailbox_dmamap) != 0)
  497                 goto error_exit;
  498 
  499         aha->init_level++;
  500 
  501         /* And permanently map them */
  502         bus_dmamap_load(aha->mailbox_dmat, aha->mailbox_dmamap,
  503             aha->out_boxes, aha->num_boxes * (sizeof(aha_mbox_in_t) +
  504             sizeof(aha_mbox_out_t)), ahamapmboxes, aha, /*flags*/0);
  505 
  506         aha->init_level++;
  507 
  508         aha->in_boxes = (aha_mbox_in_t *)&aha->out_boxes[aha->num_boxes];
  509 
  510         ahainitmboxes(aha);
  511 
  512         /* DMA tag for our ccb structures */
  513         if (bus_dma_tag_create( /* parent       */ aha->parent_dmat,
  514                                 /* alignment    */ 1,
  515                                 /* boundary     */ 0,
  516                                 /* lowaddr      */ BUS_SPACE_MAXADDR,
  517                                 /* highaddr     */ BUS_SPACE_MAXADDR,
  518                                 /* filter       */ NULL,
  519                                 /* filterarg    */ NULL,
  520                                 /* maxsize      */ aha->max_ccbs *
  521                                                    sizeof(struct aha_ccb),
  522                                 /* nsegments    */ 1,
  523                                 /* maxsegsz     */ BUS_SPACE_MAXSIZE_24BIT,
  524                                 /* flags        */ 0,
  525                                 /* lockfunc     */ NULL,
  526                                 /* lockarg      */ NULL,
  527                                 &aha->ccb_dmat) != 0) {
  528                 goto error_exit;
  529         }
  530 
  531         aha->init_level++;
  532 
  533         /* Allocation for our ccbs */
  534         if (bus_dmamem_alloc(aha->ccb_dmat, (void **)&aha->aha_ccb_array,
  535             BUS_DMA_NOWAIT, &aha->ccb_dmamap) != 0)
  536                 goto error_exit;
  537 
  538         aha->init_level++;
  539 
  540         /* And permanently map them */
  541         bus_dmamap_load(aha->ccb_dmat, aha->ccb_dmamap, aha->aha_ccb_array,
  542             aha->max_ccbs * sizeof(struct aha_ccb), ahamapccbs, aha, /*flags*/0);
  543 
  544         aha->init_level++;
  545 
  546         /* DMA tag for our S/G structures.  We allocate in page sized chunks */
  547         if (bus_dma_tag_create( /* parent       */ aha->parent_dmat,
  548                                 /* alignment    */ 1,
  549                                 /* boundary     */ 0,
  550                                 /* lowaddr      */ BUS_SPACE_MAXADDR,
  551                                 /* highaddr     */ BUS_SPACE_MAXADDR,
  552                                 /* filter       */ NULL,
  553                                 /* filterarg    */ NULL,
  554                                 /* maxsize      */ PAGE_SIZE,
  555                                 /* nsegments    */ 1,
  556                                 /* maxsegsz     */ BUS_SPACE_MAXSIZE_24BIT,
  557                                 /* flags        */ 0,
  558                                 /* lockfunc     */ NULL,
  559                                 /* lockarg      */ NULL,
  560                                 &aha->sg_dmat) != 0)
  561                 goto error_exit;
  562 
  563         aha->init_level++;
  564 
  565         /* Perform initial CCB allocation */
  566         bzero(aha->aha_ccb_array, aha->max_ccbs * sizeof(struct aha_ccb));
  567         ahaallocccbs(aha);
  568 
  569         if (aha->num_ccbs == 0) {
  570                 device_printf(aha->dev,
  571                     "aha_init - Unable to allocate initial ccbs\n");
  572                 goto error_exit;
  573         }
  574 
  575         /*
  576          * Note that we are going and return (to probe)
  577          */
  578         return (0);
  579 
  580 error_exit:
  581 
  582         return (ENXIO);
  583 }
  584 
  585 int
  586 aha_attach(struct aha_softc *aha)
  587 {
  588         int tagged_dev_openings;
  589         struct cam_devq *devq;
  590 
  591         /*
  592          * We don't do tagged queueing, since the aha cards don't
  593          * support it.
  594          */
  595         tagged_dev_openings = 0;
  596 
  597         /*
  598          * Create the device queue for our SIM.
  599          */
  600         devq = cam_simq_alloc(aha->max_ccbs - 1);
  601         if (devq == NULL)
  602                 return (ENOMEM);
  603 
  604         /*
  605          * Construct our SIM entry
  606          */
  607         aha->sim = cam_sim_alloc(ahaaction, ahapoll, "aha", aha,
  608             device_get_unit(aha->dev), &aha->lock, 2, tagged_dev_openings,
  609             devq);
  610         if (aha->sim == NULL) {
  611                 cam_simq_free(devq);
  612                 return (ENOMEM);
  613         }
  614         mtx_lock(&aha->lock);
  615         if (xpt_bus_register(aha->sim, aha->dev, 0) != CAM_SUCCESS) {
  616                 cam_sim_free(aha->sim, /*free_devq*/TRUE);
  617                 mtx_unlock(&aha->lock);
  618                 return (ENXIO);
  619         }
  620         if (xpt_create_path(&aha->path, /*periph*/NULL, cam_sim_path(aha->sim),
  621             CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
  622                 xpt_bus_deregister(cam_sim_path(aha->sim));
  623                 cam_sim_free(aha->sim, /*free_devq*/TRUE);
  624                 mtx_unlock(&aha->lock);
  625                 return (ENXIO);
  626         }
  627         mtx_unlock(&aha->lock);
  628 
  629         return (0);
  630 }
  631 
  632 static void
  633 ahaallocccbs(struct aha_softc *aha)
  634 {
  635         struct aha_ccb *next_ccb;
  636         struct sg_map_node *sg_map;
  637         bus_addr_t physaddr;
  638         aha_sg_t *segs;
  639         int newcount;
  640         int i;
  641 
  642         next_ccb = &aha->aha_ccb_array[aha->num_ccbs];
  643 
  644         sg_map = malloc(sizeof(*sg_map), M_DEVBUF, M_NOWAIT);
  645 
  646         if (sg_map == NULL)
  647                 return;
  648 
  649         /* Allocate S/G space for the next batch of CCBS */
  650         if (bus_dmamem_alloc(aha->sg_dmat, (void **)&sg_map->sg_vaddr,
  651             BUS_DMA_NOWAIT, &sg_map->sg_dmamap) != 0) {
  652                 free(sg_map, M_DEVBUF);
  653                 return;
  654         }
  655 
  656         SLIST_INSERT_HEAD(&aha->sg_maps, sg_map, links);
  657 
  658         bus_dmamap_load(aha->sg_dmat, sg_map->sg_dmamap, sg_map->sg_vaddr,
  659             PAGE_SIZE, ahamapsgs, aha, /*flags*/0);
  660 
  661         segs = sg_map->sg_vaddr;
  662         physaddr = sg_map->sg_physaddr;
  663 
  664         newcount = (PAGE_SIZE / (AHA_NSEG * sizeof(aha_sg_t)));
  665         for (i = 0; aha->num_ccbs < aha->max_ccbs && i < newcount; i++) {
  666                 int error;
  667 
  668                 next_ccb->sg_list = segs;
  669                 next_ccb->sg_list_phys = physaddr;
  670                 next_ccb->flags = ACCB_FREE;
  671                 callout_init_mtx(&next_ccb->timer, &aha->lock, 0);
  672                 error = bus_dmamap_create(aha->buffer_dmat, /*flags*/0,
  673                     &next_ccb->dmamap);
  674                 if (error != 0)
  675                         break;
  676                 SLIST_INSERT_HEAD(&aha->free_aha_ccbs, next_ccb, links);
  677                 segs += AHA_NSEG;
  678                 physaddr += (AHA_NSEG * sizeof(aha_sg_t));
  679                 next_ccb++;
  680                 aha->num_ccbs++;
  681         }
  682 
  683         /* Reserve a CCB for error recovery */
  684         if (aha->recovery_accb == NULL) {
  685                 aha->recovery_accb = SLIST_FIRST(&aha->free_aha_ccbs);
  686                 SLIST_REMOVE_HEAD(&aha->free_aha_ccbs, links);
  687         }
  688 }
  689 
  690 static __inline void
  691 ahafreeccb(struct aha_softc *aha, struct aha_ccb *accb)
  692 {
  693 
  694         if (!dumping)
  695                 mtx_assert(&aha->lock, MA_OWNED);
  696         if ((accb->flags & ACCB_ACTIVE) != 0)
  697                 LIST_REMOVE(&accb->ccb->ccb_h, sim_links.le);
  698         if (aha->resource_shortage != 0
  699             && (accb->ccb->ccb_h.status & CAM_RELEASE_SIMQ) == 0) {
  700                 accb->ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
  701                 aha->resource_shortage = FALSE;
  702         }
  703         accb->flags = ACCB_FREE;
  704         SLIST_INSERT_HEAD(&aha->free_aha_ccbs, accb, links);
  705         aha->active_ccbs--;
  706 }
  707 
  708 static struct aha_ccb*
  709 ahagetccb(struct aha_softc *aha)
  710 {
  711         struct  aha_ccb* accb;
  712 
  713         if (!dumping)
  714                 mtx_assert(&aha->lock, MA_OWNED);
  715         if ((accb = SLIST_FIRST(&aha->free_aha_ccbs)) != NULL) {
  716                 SLIST_REMOVE_HEAD(&aha->free_aha_ccbs, links);
  717                 aha->active_ccbs++;
  718         } else if (aha->num_ccbs < aha->max_ccbs) {
  719                 ahaallocccbs(aha);
  720                 accb = SLIST_FIRST(&aha->free_aha_ccbs);
  721                 if (accb == NULL)
  722                         device_printf(aha->dev, "Can't malloc ACCB\n");
  723                 else {
  724                         SLIST_REMOVE_HEAD(&aha->free_aha_ccbs, links);
  725                         aha->active_ccbs++;
  726                 }
  727         }
  728 
  729         return (accb);
  730 }
  731 
  732 static void
  733 ahaaction(struct cam_sim *sim, union ccb *ccb)
  734 {
  735         struct  aha_softc *aha;
  736 
  737         CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, ("ahaaction\n"));
  738 
  739         aha = (struct aha_softc *)cam_sim_softc(sim);
  740         mtx_assert(&aha->lock, MA_OWNED);
  741 
  742         switch (ccb->ccb_h.func_code) {
  743         /* Common cases first */
  744         case XPT_SCSI_IO:       /* Execute the requested I/O operation */
  745         case XPT_RESET_DEV:     /* Bus Device Reset the specified SCSI device */        {
  746                 struct  aha_ccb *accb;
  747                 struct  aha_hccb *hccb;
  748 
  749                 /*
  750                  * Get an accb to use.
  751                  */
  752                 if ((accb = ahagetccb(aha)) == NULL) {
  753                         aha->resource_shortage = TRUE;
  754                         xpt_freeze_simq(aha->sim, /*count*/1);
  755                         ccb->ccb_h.status = CAM_REQUEUE_REQ;
  756                         xpt_done(ccb);
  757                         return;
  758                 }
  759                 hccb = &accb->hccb;
  760 
  761                 /*
  762                  * So we can find the ACCB when an abort is requested
  763                  */
  764                 accb->ccb = ccb;
  765                 ccb->ccb_h.ccb_accb_ptr = accb;
  766                 ccb->ccb_h.ccb_aha_ptr = aha;
  767 
  768                 /*
  769                  * Put all the arguments for the xfer in the accb
  770                  */
  771                 hccb->target = ccb->ccb_h.target_id;
  772                 hccb->lun = ccb->ccb_h.target_lun;
  773                 hccb->ahastat = 0;
  774                 hccb->sdstat = 0;
  775 
  776                 if (ccb->ccb_h.func_code == XPT_SCSI_IO) {
  777                         struct ccb_scsiio *csio;
  778                         struct ccb_hdr *ccbh;
  779                         int error;
  780 
  781                         csio = &ccb->csio;
  782                         ccbh = &csio->ccb_h;
  783                         hccb->opcode = aha->ccb_ccb_opcode;
  784                         hccb->datain = (ccb->ccb_h.flags & CAM_DIR_IN) != 0;
  785                         hccb->dataout = (ccb->ccb_h.flags & CAM_DIR_OUT) != 0;
  786                         hccb->cmd_len = csio->cdb_len;
  787                         if (hccb->cmd_len > sizeof(hccb->scsi_cdb)) {
  788                                 ccb->ccb_h.status = CAM_REQ_INVALID;
  789                                 ahafreeccb(aha, accb);
  790                                 xpt_done(ccb);
  791                                 return;
  792                         }
  793                         hccb->sense_len = csio->sense_len;
  794                         if ((ccbh->flags & CAM_CDB_POINTER) != 0) {
  795                                 if ((ccbh->flags & CAM_CDB_PHYS) == 0) {
  796                                         bcopy(csio->cdb_io.cdb_ptr,
  797                                               hccb->scsi_cdb, hccb->cmd_len);
  798                                 } else {
  799                                         /* I guess I could map it in... */
  800                                         ccbh->status = CAM_REQ_INVALID;
  801                                         ahafreeccb(aha, accb);
  802                                         xpt_done(ccb);
  803                                         return;
  804                                 }
  805                         } else {
  806                                 bcopy(csio->cdb_io.cdb_bytes,
  807                                       hccb->scsi_cdb, hccb->cmd_len);
  808                         }
  809                         /*
  810                          * If we have any data to send with this command,
  811                          * map it into bus space.
  812                          */
  813 
  814                         error = bus_dmamap_load_ccb(
  815                             aha->buffer_dmat,
  816                             accb->dmamap,
  817                             ccb,
  818                             ahaexecuteccb,
  819                             accb,
  820                             /*flags*/0);
  821                         if (error == EINPROGRESS) {
  822                                 /*
  823                                  * So as to maintain ordering, freeze the
  824                                  * controller queue until our mapping is
  825                                  * returned.
  826                                  */
  827                                 xpt_freeze_simq(aha->sim, 1);
  828                                 csio->ccb_h.status |= CAM_RELEASE_SIMQ;
  829                         }
  830                 } else {
  831                         hccb->opcode = INITIATOR_BUS_DEV_RESET;
  832                         /* No data transfer */
  833                         hccb->datain = TRUE;
  834                         hccb->dataout = TRUE;
  835                         hccb->cmd_len = 0;
  836                         hccb->sense_len = 0;
  837                         ahaexecuteccb(accb, NULL, 0, 0);
  838                 }
  839                 break;
  840         }
  841         case XPT_ABORT:                 /* Abort the specified CCB */
  842                 /* XXX Implement */
  843                 ccb->ccb_h.status = CAM_REQ_INVALID;
  844                 xpt_done(ccb);
  845                 break;
  846         case XPT_SET_TRAN_SETTINGS:
  847                 /* XXX Implement */
  848                 ccb->ccb_h.status = CAM_PROVIDE_FAIL;
  849                 xpt_done(ccb);
  850                 break;
  851         case XPT_GET_TRAN_SETTINGS:
  852         /* Get default/user set transfer settings for the target */
  853         {
  854                 struct  ccb_trans_settings *cts = &ccb->cts;
  855                 u_int   target_mask = 0x01 << ccb->ccb_h.target_id;
  856                 struct ccb_trans_settings_scsi *scsi =
  857                     &cts->proto_specific.scsi;
  858                 struct ccb_trans_settings_spi *spi =
  859                     &cts->xport_specific.spi;
  860 
  861                 cts->protocol = PROTO_SCSI;
  862                 cts->protocol_version = SCSI_REV_2;
  863                 cts->transport = XPORT_SPI;
  864                 cts->transport_version = 2;
  865                 if (cts->type == CTS_TYPE_USER_SETTINGS) {
  866                         spi->flags = 0;
  867                         if ((aha->disc_permitted & target_mask) != 0)
  868                                 spi->flags |= CTS_SPI_FLAGS_DISC_ENB;
  869                         spi->bus_width = MSG_EXT_WDTR_BUS_8_BIT;
  870                         if ((aha->sync_permitted & target_mask) != 0) {
  871                                 if (aha->boardid >= BOARD_1542CF)
  872                                         spi->sync_period = 25;
  873                                 else
  874                                         spi->sync_period = 50;
  875                         } else {
  876                                 spi->sync_period = 0;
  877                         }
  878 
  879                         if (spi->sync_period != 0)
  880                                 spi->sync_offset = 15;
  881 
  882                         spi->valid = CTS_SPI_VALID_SYNC_RATE
  883                                    | CTS_SPI_VALID_SYNC_OFFSET
  884                                    | CTS_SPI_VALID_BUS_WIDTH
  885                                    | CTS_SPI_VALID_DISC;
  886                         scsi->valid = CTS_SCSI_VALID_TQ;
  887                 } else {
  888                         ahafetchtransinfo(aha, cts);
  889                 }
  890 
  891                 ccb->ccb_h.status = CAM_REQ_CMP;
  892                 xpt_done(ccb);
  893                 break;
  894         }
  895         case XPT_CALC_GEOMETRY:
  896         {
  897                 struct    ccb_calc_geometry *ccg;
  898                 uint32_t size_mb;
  899                 uint32_t secs_per_cylinder;
  900 
  901                 ccg = &ccb->ccg;
  902                 size_mb = ccg->volume_size
  903                         / ((1024L * 1024L) / ccg->block_size);
  904                 if (size_mb >= 1024 && (aha->extended_trans != 0)) {
  905                         if (size_mb >= 2048) {
  906                                 ccg->heads = 255;
  907                                 ccg->secs_per_track = 63;
  908                         } else {
  909                                 ccg->heads = 128;
  910                                 ccg->secs_per_track = 32;
  911                         }
  912                 } else {
  913                         ccg->heads = 64;
  914                         ccg->secs_per_track = 32;
  915                 }
  916                 secs_per_cylinder = ccg->heads * ccg->secs_per_track;
  917                 ccg->cylinders = ccg->volume_size / secs_per_cylinder;
  918                 ccb->ccb_h.status = CAM_REQ_CMP;
  919                 xpt_done(ccb);
  920                 break;
  921         }
  922         case XPT_RESET_BUS:             /* Reset the specified SCSI bus */
  923                 ahareset(aha, /*hardreset*/TRUE);
  924                 ccb->ccb_h.status = CAM_REQ_CMP;
  925                 xpt_done(ccb);
  926                 break;
  927         case XPT_TERM_IO:               /* Terminate the I/O process */
  928                 /* XXX Implement */
  929                 ccb->ccb_h.status = CAM_REQ_INVALID;
  930                 xpt_done(ccb);
  931                 break;
  932         case XPT_PATH_INQ:              /* Path routing inquiry */
  933         {
  934                 struct ccb_pathinq *cpi = &ccb->cpi;
  935 
  936                 cpi->version_num = 1; /* XXX??? */
  937                 cpi->hba_inquiry = PI_SDTR_ABLE;
  938                 cpi->target_sprt = 0;
  939                 cpi->hba_misc = 0;
  940                 cpi->hba_eng_cnt = 0;
  941                 cpi->max_target = 7;
  942                 cpi->max_lun = 7;
  943                 cpi->initiator_id = aha->scsi_id;
  944                 cpi->bus_id = cam_sim_bus(sim);
  945                 cpi->base_transfer_speed = 3300;
  946                 strlcpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
  947                 strlcpy(cpi->hba_vid, "Adaptec", HBA_IDLEN);
  948                 strlcpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
  949                 cpi->unit_number = cam_sim_unit(sim);
  950                 cpi->transport = XPORT_SPI;
  951                 cpi->transport_version = 2;
  952                 cpi->protocol = PROTO_SCSI;
  953                 cpi->protocol_version = SCSI_REV_2;
  954                 cpi->ccb_h.status = CAM_REQ_CMP;
  955                 xpt_done(ccb);
  956                 break;
  957         }
  958         default:
  959                 ccb->ccb_h.status = CAM_REQ_INVALID;
  960                 xpt_done(ccb);
  961                 break;
  962         }
  963 }
  964 
  965 static void
  966 ahaexecuteccb(void *arg, bus_dma_segment_t *dm_segs, int nseg, int error)
  967 {
  968         struct   aha_ccb *accb;
  969         union    ccb *ccb;
  970         struct   aha_softc *aha;
  971         uint32_t paddr;
  972 
  973         accb = (struct aha_ccb *)arg;
  974         ccb = accb->ccb;
  975         aha = (struct aha_softc *)ccb->ccb_h.ccb_aha_ptr;
  976 
  977         if (error != 0) {
  978                 if (error != EFBIG)
  979                         device_printf(aha->dev,
  980                             "Unexepected error 0x%x returned from "
  981                             "bus_dmamap_load\n", error);
  982                 if (ccb->ccb_h.status == CAM_REQ_INPROG) {
  983                         xpt_freeze_devq(ccb->ccb_h.path, /*count*/1);
  984                         ccb->ccb_h.status = CAM_REQ_TOO_BIG|CAM_DEV_QFRZN;
  985                 }
  986                 ahafreeccb(aha, accb);
  987                 xpt_done(ccb);
  988                 return;
  989         }
  990 
  991         if (nseg != 0) {
  992                 aha_sg_t *sg;
  993                 bus_dma_segment_t *end_seg;
  994                 bus_dmasync_op_t op;
  995 
  996                 end_seg = dm_segs + nseg;
  997 
  998                 /* Copy the segments into our SG list */
  999                 sg = accb->sg_list;
 1000                 while (dm_segs < end_seg) {
 1001                         ahautoa24(dm_segs->ds_len, sg->len);
 1002                         ahautoa24(dm_segs->ds_addr, sg->addr);
 1003                         sg++;
 1004                         dm_segs++;
 1005                 }
 1006 
 1007                 if (nseg > 1) {
 1008                         accb->hccb.opcode = aha->ccb_sg_opcode;
 1009                         ahautoa24((sizeof(aha_sg_t) * nseg),
 1010                             accb->hccb.data_len);
 1011                         ahautoa24(accb->sg_list_phys, accb->hccb.data_addr);
 1012                 } else {
 1013                         bcopy(accb->sg_list->len, accb->hccb.data_len, 3);
 1014                         bcopy(accb->sg_list->addr, accb->hccb.data_addr, 3);
 1015                 }
 1016 
 1017                 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
 1018                         op = BUS_DMASYNC_PREREAD;
 1019                 else
 1020                         op = BUS_DMASYNC_PREWRITE;
 1021 
 1022                 bus_dmamap_sync(aha->buffer_dmat, accb->dmamap, op);
 1023 
 1024         } else {
 1025                 accb->hccb.opcode = INITIATOR_CCB;
 1026                 ahautoa24(0, accb->hccb.data_len);
 1027                 ahautoa24(0, accb->hccb.data_addr);
 1028         }
 1029 
 1030         /*
 1031          * Last time we need to check if this CCB needs to
 1032          * be aborted.
 1033          */
 1034         if (ccb->ccb_h.status != CAM_REQ_INPROG) {
 1035                 if (nseg != 0)
 1036                         bus_dmamap_unload(aha->buffer_dmat, accb->dmamap);
 1037                 ahafreeccb(aha, accb);
 1038                 xpt_done(ccb);
 1039                 return;
 1040         }
 1041 
 1042         accb->flags = ACCB_ACTIVE;
 1043         ccb->ccb_h.status |= CAM_SIM_QUEUED;
 1044         LIST_INSERT_HEAD(&aha->pending_ccbs, &ccb->ccb_h, sim_links.le);
 1045 
 1046         callout_reset_sbt(&accb->timer, SBT_1MS * ccb->ccb_h.timeout, 0,
 1047             ahatimeout, accb, 0);
 1048 
 1049         /* Tell the adapter about this command */
 1050         if (aha->cur_outbox->action_code != AMBO_FREE) {
 1051                 /*
 1052                  * We should never encounter a busy mailbox.
 1053                  * If we do, warn the user, and treat it as
 1054                  * a resource shortage.  If the controller is
 1055                  * hung, one of the pending transactions will
 1056                  * timeout causing us to start recovery operations.
 1057                  */
 1058                 device_printf(aha->dev,
 1059                     "Encountered busy mailbox with %d out of %d "
 1060                     "commands active!!!", aha->active_ccbs, aha->max_ccbs);
 1061                 callout_stop(&accb->timer);
 1062                 if (nseg != 0)
 1063                         bus_dmamap_unload(aha->buffer_dmat, accb->dmamap);
 1064                 ahafreeccb(aha, accb);
 1065                 aha->resource_shortage = TRUE;
 1066                 xpt_freeze_simq(aha->sim, /*count*/1);
 1067                 ccb->ccb_h.status = CAM_REQUEUE_REQ;
 1068                 xpt_done(ccb);
 1069                 return;
 1070         }
 1071         paddr = ahaccbvtop(aha, accb);
 1072         ahautoa24(paddr, aha->cur_outbox->ccb_addr);
 1073         aha->cur_outbox->action_code = AMBO_START;
 1074         aha_outb(aha, COMMAND_REG, AOP_START_MBOX);
 1075 
 1076         ahanextoutbox(aha);
 1077 }
 1078 
 1079 void
 1080 aha_intr(void *arg)
 1081 {
 1082         struct  aha_softc *aha;
 1083 
 1084         aha = arg;
 1085         mtx_lock(&aha->lock);
 1086         aha_intr_locked(aha);
 1087         mtx_unlock(&aha->lock);
 1088 }
 1089 
 1090 void
 1091 aha_intr_locked(struct aha_softc *aha)
 1092 {
 1093         u_int   intstat;
 1094         uint32_t paddr;
 1095 
 1096         while (((intstat = aha_inb(aha, INTSTAT_REG)) & INTR_PENDING) != 0) {
 1097                 if ((intstat & CMD_COMPLETE) != 0) {
 1098                         aha->latched_status = aha_inb(aha, STATUS_REG);
 1099                         aha->command_cmp = TRUE;
 1100                 }
 1101 
 1102                 aha_outb(aha, CONTROL_REG, RESET_INTR);
 1103 
 1104                 if ((intstat & IMB_LOADED) != 0) {
 1105                         while (aha->cur_inbox->comp_code != AMBI_FREE) {
 1106                                 paddr = aha_a24tou(aha->cur_inbox->ccb_addr);
 1107                                 ahadone(aha, ahaccbptov(aha, paddr),
 1108                                     aha->cur_inbox->comp_code);
 1109                                 aha->cur_inbox->comp_code = AMBI_FREE;
 1110                                 ahanextinbox(aha);
 1111                         }
 1112                 }
 1113 
 1114                 if ((intstat & SCSI_BUS_RESET) != 0) {
 1115                         ahareset(aha, /*hardreset*/FALSE);
 1116                 }
 1117         }
 1118 }
 1119 
 1120 static void
 1121 ahadone(struct aha_softc *aha, struct aha_ccb *accb, aha_mbi_comp_code_t comp_code)
 1122 {
 1123         union  ccb        *ccb;
 1124         struct ccb_scsiio *csio;
 1125 
 1126         ccb = accb->ccb;
 1127         csio = &accb->ccb->csio;
 1128 
 1129         if ((accb->flags & ACCB_ACTIVE) == 0) {
 1130                 device_printf(aha->dev, 
 1131                     "ahadone - Attempt to free non-active ACCB %p\n",
 1132                     (void *)accb);
 1133                 return;
 1134         }
 1135 
 1136         if ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
 1137                 bus_dmasync_op_t op;
 1138 
 1139                 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
 1140                         op = BUS_DMASYNC_POSTREAD;
 1141                 else
 1142                         op = BUS_DMASYNC_POSTWRITE;
 1143                 bus_dmamap_sync(aha->buffer_dmat, accb->dmamap, op);
 1144                 bus_dmamap_unload(aha->buffer_dmat, accb->dmamap);
 1145         }
 1146 
 1147         if (accb == aha->recovery_accb) {
 1148                 /*
 1149                  * The recovery ACCB does not have a CCB associated
 1150                  * with it, so short circuit the normal error handling.
 1151                  * We now traverse our list of pending CCBs and process
 1152                  * any that were terminated by the recovery CCBs action.
 1153                  * We also reinstate timeouts for all remaining, pending,
 1154                  * CCBs.
 1155                  */
 1156                 struct cam_path *path;
 1157                 struct ccb_hdr *ccb_h;
 1158                 cam_status error;
 1159 
 1160                 /* Notify all clients that a BDR occurred */
 1161                 error = xpt_create_path(&path, /*periph*/NULL,
 1162                     cam_sim_path(aha->sim), accb->hccb.target,
 1163                     CAM_LUN_WILDCARD);
 1164 
 1165                 if (error == CAM_REQ_CMP) {
 1166                         xpt_async(AC_SENT_BDR, path, NULL);
 1167                         xpt_free_path(path);
 1168                 }
 1169 
 1170                 ccb_h = LIST_FIRST(&aha->pending_ccbs);
 1171                 while (ccb_h != NULL) {
 1172                         struct aha_ccb *pending_accb;
 1173 
 1174                         pending_accb = (struct aha_ccb *)ccb_h->ccb_accb_ptr;
 1175                         if (pending_accb->hccb.target == accb->hccb.target) {
 1176                                 pending_accb->hccb.ahastat = AHASTAT_HA_BDR;
 1177                                 ccb_h = LIST_NEXT(ccb_h, sim_links.le);
 1178                                 ahadone(aha, pending_accb, AMBI_ERROR);
 1179                         } else {
 1180                                 callout_reset_sbt(&pending_accb->timer,
 1181                                     SBT_1MS * ccb_h->timeout, 0, ahatimeout,
 1182                                     pending_accb, 0);
 1183                                 ccb_h = LIST_NEXT(ccb_h, sim_links.le);
 1184                         }
 1185                 }
 1186                 device_printf(aha->dev, "No longer in timeout\n");
 1187                 return;
 1188         }
 1189 
 1190         callout_stop(&accb->timer);
 1191 
 1192         switch (comp_code) {
 1193         case AMBI_FREE:
 1194                 device_printf(aha->dev,
 1195                     "ahadone - CCB completed with free status!\n");
 1196                 break;
 1197         case AMBI_NOT_FOUND:
 1198                 device_printf(aha->dev,
 1199                     "ahadone - CCB Abort failed to find CCB\n");
 1200                 break;
 1201         case AMBI_ABORT:
 1202         case AMBI_ERROR:
 1203                 /* An error occurred */
 1204                 if (accb->hccb.opcode < INITIATOR_CCB_WRESID)
 1205                         csio->resid = 0;
 1206                 else
 1207                         csio->resid = aha_a24tou(accb->hccb.data_len);
 1208                 switch(accb->hccb.ahastat) {
 1209                 case AHASTAT_DATARUN_ERROR:
 1210                 {
 1211                         if (csio->resid <= 0) {
 1212                                 csio->ccb_h.status = CAM_DATA_RUN_ERR;
 1213                                 break;
 1214                         }
 1215                         /* FALLTHROUGH */
 1216                 }
 1217                 case AHASTAT_NOERROR:
 1218                         csio->scsi_status = accb->hccb.sdstat;
 1219                         csio->ccb_h.status |= CAM_SCSI_STATUS_ERROR;
 1220                         switch(csio->scsi_status) {
 1221                         case SCSI_STATUS_CHECK_COND:
 1222                         case SCSI_STATUS_CMD_TERMINATED:
 1223                                 csio->ccb_h.status |= CAM_AUTOSNS_VALID;
 1224                                 /*
 1225                                  * The aha writes the sense data at different
 1226                                  * offsets based on the scsi cmd len
 1227                                  */
 1228                                 bcopy((caddr_t) &accb->hccb.scsi_cdb +
 1229                                     accb->hccb.cmd_len,
 1230                                     (caddr_t) &csio->sense_data,
 1231                                     accb->hccb.sense_len);
 1232                                 break;
 1233                         default:
 1234                                 break;
 1235                         case SCSI_STATUS_OK:
 1236                                 csio->ccb_h.status = CAM_REQ_CMP;
 1237                                 break;
 1238                         }
 1239                         break;
 1240                 case AHASTAT_SELTIMEOUT:
 1241                         csio->ccb_h.status = CAM_SEL_TIMEOUT;
 1242                         break;
 1243                 case AHASTAT_UNEXPECTED_BUSFREE:
 1244                         csio->ccb_h.status = CAM_UNEXP_BUSFREE;
 1245                         break;
 1246                 case AHASTAT_INVALID_PHASE:
 1247                         csio->ccb_h.status = CAM_SEQUENCE_FAIL;
 1248                         break;
 1249                 case AHASTAT_INVALID_ACTION_CODE:
 1250                         panic("%s: Inavlid Action code", aha_name(aha));
 1251                         break;
 1252                 case AHASTAT_INVALID_OPCODE:
 1253                         if (accb->hccb.opcode < INITIATOR_CCB_WRESID)
 1254                                 panic("%s: Invalid CCB Opcode %x hccb = %p",
 1255                                     aha_name(aha), accb->hccb.opcode,
 1256                                     &accb->hccb);
 1257                         device_printf(aha->dev,
 1258                             "AHA-1540A compensation failed\n");
 1259                         xpt_freeze_devq(ccb->ccb_h.path, /*count*/1);
 1260                         csio->ccb_h.status = CAM_REQUEUE_REQ;
 1261                         break;
 1262                 case AHASTAT_LINKED_CCB_LUN_MISMATCH:
 1263                         /* We don't even support linked commands... */
 1264                         panic("%s: Linked CCB Lun Mismatch", aha_name(aha));
 1265                         break;
 1266                 case AHASTAT_INVALID_CCB_OR_SG_PARAM:
 1267                         panic("%s: Invalid CCB or SG list", aha_name(aha));
 1268                         break;
 1269                 case AHASTAT_HA_SCSI_BUS_RESET:
 1270                         if ((csio->ccb_h.status & CAM_STATUS_MASK)
 1271                             != CAM_CMD_TIMEOUT)
 1272                                 csio->ccb_h.status = CAM_SCSI_BUS_RESET;
 1273                         break;
 1274                 case AHASTAT_HA_BDR:
 1275                         if ((accb->flags & ACCB_DEVICE_RESET) == 0)
 1276                                 csio->ccb_h.status = CAM_BDR_SENT;
 1277                         else
 1278                                 csio->ccb_h.status = CAM_CMD_TIMEOUT;
 1279                         break;
 1280                 }
 1281                 if (csio->ccb_h.status != CAM_REQ_CMP) {
 1282                         xpt_freeze_devq(csio->ccb_h.path, /*count*/1);
 1283                         csio->ccb_h.status |= CAM_DEV_QFRZN;
 1284                 }
 1285                 if ((accb->flags & ACCB_RELEASE_SIMQ) != 0)
 1286                         ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
 1287                 ahafreeccb(aha, accb);
 1288                 xpt_done(ccb);
 1289                 break;
 1290         case AMBI_OK:
 1291                 /* All completed without incident */
 1292                 /* XXX DO WE NEED TO COPY SENSE BYTES HERE???? XXX */
 1293                 /* I don't think so since it works???? */
 1294                 ccb->ccb_h.status |= CAM_REQ_CMP;
 1295                 if ((accb->flags & ACCB_RELEASE_SIMQ) != 0)
 1296                         ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
 1297                 ahafreeccb(aha, accb);
 1298                 xpt_done(ccb);
 1299                 break;
 1300         }
 1301 }
 1302 
 1303 static int
 1304 ahareset(struct aha_softc* aha, int hard_reset)
 1305 {
 1306         struct   ccb_hdr *ccb_h;
 1307         u_int    status;
 1308         u_int    timeout;
 1309         uint8_t reset_type;
 1310 
 1311         if (hard_reset != 0)
 1312                 reset_type = HARD_RESET;
 1313         else
 1314                 reset_type = SOFT_RESET;
 1315         aha_outb(aha, CONTROL_REG, reset_type);
 1316 
 1317         /* Wait 5sec. for Diagnostic start */
 1318         timeout = 5 * 10000;
 1319         while (--timeout) {
 1320                 status = aha_inb(aha, STATUS_REG);
 1321                 if ((status & DIAG_ACTIVE) != 0)
 1322                         break;
 1323                 DELAY(100);
 1324         }
 1325         if (timeout == 0) {
 1326                 PRVERB((aha->dev, "ahareset - Diagnostic Active failed to "
 1327                     "assert. status = %#x\n", status));
 1328                 return (ETIMEDOUT);
 1329         }
 1330 
 1331         /* Wait 10sec. for Diagnostic end */
 1332         timeout = 10 * 10000;
 1333         while (--timeout) {
 1334                 status = aha_inb(aha, STATUS_REG);
 1335                 if ((status & DIAG_ACTIVE) == 0)
 1336                         break;
 1337                 DELAY(100);
 1338         }
 1339         if (timeout == 0) {
 1340                 panic("%s: ahareset - Diagnostic Active failed to drop. "
 1341                     "status = 0x%x\n", aha_name(aha), status);
 1342                 return (ETIMEDOUT);
 1343         }
 1344 
 1345         /* Wait for the host adapter to become ready or report a failure */
 1346         timeout = 10000;
 1347         while (--timeout) {
 1348                 status = aha_inb(aha, STATUS_REG);
 1349                 if ((status & (DIAG_FAIL|HA_READY|DATAIN_REG_READY)) != 0)
 1350                         break;
 1351                 DELAY(100);
 1352         }
 1353         if (timeout == 0) {
 1354                 device_printf(aha->dev, "ahareset - Host adapter failed to "
 1355                     "come ready. status = 0x%x\n", status);
 1356                 return (ETIMEDOUT);
 1357         }
 1358 
 1359         /* If the diagnostics failed, tell the user */
 1360         if ((status & DIAG_FAIL) != 0
 1361          || (status & HA_READY) == 0) {
 1362                 device_printf(aha->dev, "ahareset - Adapter failed diag\n");
 1363 
 1364                 if ((status & DATAIN_REG_READY) != 0)
 1365                         device_printf(aha->dev, "ahareset - Host Adapter "
 1366                             "Error code = 0x%x\n", aha_inb(aha, DATAIN_REG));
 1367                 return (ENXIO);
 1368         }
 1369 
 1370         /* If we've attached to the XPT, tell it about the event */
 1371         if (aha->path != NULL)
 1372                 xpt_async(AC_BUS_RESET, aha->path, NULL);
 1373 
 1374         /*
 1375          * Perform completion processing for all outstanding CCBs.
 1376          */
 1377         while ((ccb_h = LIST_FIRST(&aha->pending_ccbs)) != NULL) {
 1378                 struct aha_ccb *pending_accb;
 1379 
 1380                 pending_accb = (struct aha_ccb *)ccb_h->ccb_accb_ptr;
 1381                 pending_accb->hccb.ahastat = AHASTAT_HA_SCSI_BUS_RESET;
 1382                 ahadone(aha, pending_accb, AMBI_ERROR);
 1383         }
 1384 
 1385         /* If we've allocated mailboxes, initialize them */
 1386         /* Must be done after we've aborted our queue, or aha_cmd fails */
 1387         if (aha->init_level > 4)
 1388                 ahainitmboxes(aha);
 1389 
 1390         return (0);
 1391 }
 1392 
 1393 /*
 1394  * Send a command to the adapter.
 1395  */
 1396 int
 1397 aha_cmd(struct aha_softc *aha, aha_op_t opcode, uint8_t *params,
 1398         u_int param_len, uint8_t *reply_data, u_int reply_len,
 1399         u_int cmd_timeout)
 1400 {
 1401         u_int   timeout;
 1402         u_int   status;
 1403         u_int   saved_status;
 1404         u_int   intstat;
 1405         u_int   reply_buf_size;
 1406         int     cmd_complete;
 1407         int     error;
 1408 
 1409         /* No data returned to start */
 1410         reply_buf_size = reply_len;
 1411         reply_len = 0;
 1412         intstat = 0;
 1413         cmd_complete = 0;
 1414         saved_status = 0;
 1415         error = 0;
 1416 
 1417         /*
 1418          * All commands except for the "start mailbox" and the "enable
 1419          * outgoing mailbox read interrupt" commands cannot be issued
 1420          * while there are pending transactions.  Freeze our SIMQ
 1421          * and wait for all completions to occur if necessary.
 1422          */
 1423         timeout = 10000;
 1424         while (LIST_FIRST(&aha->pending_ccbs) != NULL && --timeout) {
 1425                 /* Fire the interrupt handler in case interrupts are blocked */
 1426                 aha_intr(aha);
 1427                 DELAY(10);
 1428         }
 1429 
 1430         if (timeout == 0) {
 1431                 device_printf(aha->dev, 
 1432                     "aha_cmd: Timeout waiting for adapter idle\n");
 1433                 return (ETIMEDOUT);
 1434         }
 1435         aha->command_cmp = 0;
 1436         /*
 1437          * Wait up to 10 sec. for the adapter to become
 1438          * ready to accept commands.
 1439          */
 1440         timeout = 100000;
 1441         while (--timeout) {
 1442                 status = aha_inb(aha, STATUS_REG);
 1443                 if ((status & HA_READY) != 0 && (status & CMD_REG_BUSY) == 0)
 1444                         break;
 1445                 /*
 1446                  * Throw away any pending data which may be
 1447                  * left over from earlier commands that we
 1448                  * timedout on.
 1449                  */
 1450                 if ((status & DATAIN_REG_READY) != 0)
 1451                         (void)aha_inb(aha, DATAIN_REG);
 1452                 DELAY(100);
 1453         }
 1454         if (timeout == 0) {
 1455                 device_printf(aha->dev, "aha_cmd: Timeout waiting for adapter"
 1456                     " ready, status = 0x%x\n", status);
 1457                 return (ETIMEDOUT);
 1458         }
 1459 
 1460         /*
 1461          * Send the opcode followed by any necessary parameter bytes.
 1462          */
 1463         aha_outb(aha, COMMAND_REG, opcode);
 1464 
 1465         /*
 1466          * Wait for up to 1sec to get the parameter list sent
 1467          */
 1468         timeout = 10000;
 1469         while (param_len && --timeout) {
 1470                 DELAY(100);
 1471                 status = aha_inb(aha, STATUS_REG);
 1472                 intstat = aha_inb(aha, INTSTAT_REG);
 1473 
 1474                 if ((intstat & (INTR_PENDING|CMD_COMPLETE))
 1475                  == (INTR_PENDING|CMD_COMPLETE)) {
 1476                         saved_status = status;
 1477                         cmd_complete = 1;
 1478                         break;
 1479                 }
 1480 
 1481                 if (aha->command_cmp != 0) {
 1482                         saved_status = aha->latched_status;
 1483                         cmd_complete = 1;
 1484                         break;
 1485                 }
 1486                 if ((status & DATAIN_REG_READY) != 0)
 1487                         break;
 1488                 if ((status & CMD_REG_BUSY) == 0) {
 1489                         aha_outb(aha, COMMAND_REG, *params++);
 1490                         param_len--;
 1491                         timeout = 10000;
 1492                 }
 1493         }
 1494         if (timeout == 0) {
 1495                 device_printf(aha->dev, "aha_cmd: Timeout sending parameters, "
 1496                     "status = 0x%x\n", status);
 1497                 error = ETIMEDOUT;
 1498         }
 1499 
 1500         /*
 1501          * For all other commands, we wait for any output data
 1502          * and the final comand completion interrupt.
 1503          */
 1504         while (cmd_complete == 0 && --cmd_timeout) {
 1505 
 1506                 status = aha_inb(aha, STATUS_REG);
 1507                 intstat = aha_inb(aha, INTSTAT_REG);
 1508 
 1509                 if (aha->command_cmp != 0) {
 1510                         cmd_complete = 1;
 1511                         saved_status = aha->latched_status;
 1512                 } else if ((intstat & (INTR_PENDING|CMD_COMPLETE))
 1513                         == (INTR_PENDING|CMD_COMPLETE)) {
 1514                         /*
 1515                          * Our poll (in case interrupts are blocked)
 1516                          * saw the CMD_COMPLETE interrupt.
 1517                          */
 1518                         cmd_complete = 1;
 1519                         saved_status = status;
 1520                 }
 1521                 if ((status & DATAIN_REG_READY) != 0) {
 1522                         uint8_t data;
 1523 
 1524                         data = aha_inb(aha, DATAIN_REG);
 1525                         if (reply_len < reply_buf_size) {
 1526                                 *reply_data++ = data;
 1527                         } else {
 1528                                 device_printf(aha->dev, 
 1529                                     "aha_cmd - Discarded reply data "
 1530                                     "byte for opcode 0x%x\n", opcode);
 1531                         }
 1532                         /*
 1533                          * Reset timeout to ensure at least a second
 1534                          * between response bytes.
 1535                          */
 1536                         cmd_timeout = MAX(cmd_timeout, 10000);
 1537                         reply_len++;
 1538                 }
 1539                 DELAY(100);
 1540         }
 1541         if (cmd_timeout == 0) {
 1542                 device_printf(aha->dev, "aha_cmd: Timeout: status = 0x%x, "
 1543                     "intstat = 0x%x, reply_len = %d\n", status, intstat,
 1544                     reply_len);
 1545                 return (ETIMEDOUT);
 1546         }
 1547 
 1548         /*
 1549          * Clear any pending interrupts.  Block interrupts so our
 1550          * interrupt handler is not re-entered.
 1551          */
 1552         aha_intr(aha);
 1553 
 1554         if (error != 0)
 1555                 return (error);
 1556 
 1557         /*
 1558          * If the command was rejected by the controller, tell the caller.
 1559          */
 1560         if ((saved_status & CMD_INVALID) != 0) {
 1561                 PRVERB((aha->dev, "Invalid Command 0x%x\n", opcode));
 1562                 /*
 1563                  * Some early adapters may not recover properly from
 1564                  * an invalid command.  If it appears that the controller
 1565                  * has wedged (i.e. status was not cleared by our interrupt
 1566                  * reset above), perform a soft reset.
 1567                  */
 1568                 DELAY(1000);
 1569                 status = aha_inb(aha, STATUS_REG);
 1570                 if ((status & (CMD_INVALID|STATUS_REG_RSVD|DATAIN_REG_READY|
 1571                               CMD_REG_BUSY|DIAG_FAIL|DIAG_ACTIVE)) != 0
 1572                  || (status & (HA_READY|INIT_REQUIRED))
 1573                   != (HA_READY|INIT_REQUIRED))
 1574                         ahareset(aha, /*hard_reset*/FALSE);
 1575                 return (EINVAL);
 1576         }
 1577 
 1578         if (param_len > 0) {
 1579                 /* The controller did not accept the full argument list */
 1580                 PRVERB((aha->dev, "Controller did not accept full argument "
 1581                     "list (%d > 0)\n", param_len));
 1582                 return (E2BIG);
 1583         }
 1584 
 1585         if (reply_len != reply_buf_size) {
 1586                 /* Too much or too little data received */
 1587                 PRVERB((aha->dev, "data received mismatch (%d != %d)\n",
 1588                     reply_len, reply_buf_size));
 1589                 return (EMSGSIZE);
 1590         }
 1591 
 1592         /* We were successful */
 1593         return (0);
 1594 }
 1595 
 1596 static int
 1597 ahainitmboxes(struct aha_softc *aha)
 1598 {
 1599         int error;
 1600         init_24b_mbox_params_t init_mbox;
 1601 
 1602         bzero(aha->in_boxes, sizeof(aha_mbox_in_t) * aha->num_boxes);
 1603         bzero(aha->out_boxes, sizeof(aha_mbox_out_t) * aha->num_boxes);
 1604         aha->cur_inbox = aha->in_boxes;
 1605         aha->last_inbox = aha->in_boxes + aha->num_boxes - 1;
 1606         aha->cur_outbox = aha->out_boxes;
 1607         aha->last_outbox = aha->out_boxes + aha->num_boxes - 1;
 1608 
 1609         /* Tell the adapter about them */
 1610         init_mbox.num_mboxes = aha->num_boxes;
 1611         ahautoa24(aha->mailbox_physbase, init_mbox.base_addr);
 1612         error = aha_cmd(aha, AOP_INITIALIZE_MBOX, (uint8_t *)&init_mbox,
 1613             /*parmlen*/sizeof(init_mbox), /*reply_buf*/NULL,
 1614             /*reply_len*/0, DEFAULT_CMD_TIMEOUT);
 1615 
 1616         if (error != 0)
 1617                 printf("ahainitmboxes: Initialization command failed\n");
 1618         return (error);
 1619 }
 1620 
 1621 /*
 1622  * Update the XPT's idea of the negotiated transfer
 1623  * parameters for a particular target.
 1624  */
 1625 static void
 1626 ahafetchtransinfo(struct aha_softc *aha, struct ccb_trans_settings* cts)
 1627 {
 1628         setup_data_t    setup_info;
 1629         u_int           target;
 1630         u_int           targ_offset;
 1631         u_int           sync_period;
 1632         int             error;
 1633         uint8_t param;
 1634         targ_syncinfo_t sync_info;
 1635         struct ccb_trans_settings_spi *spi = &cts->xport_specific.spi;
 1636 
 1637         target = cts->ccb_h.target_id;
 1638         targ_offset = (target & 0x7);
 1639 
 1640         /*
 1641          * Inquire Setup Information.  This command retreives
 1642          * the sync info for older models.
 1643          */
 1644         param = sizeof(setup_info);
 1645         error = aha_cmd(aha, AOP_INQUIRE_SETUP_INFO, &param, /*paramlen*/1,
 1646             (uint8_t*)&setup_info, sizeof(setup_info), DEFAULT_CMD_TIMEOUT);
 1647 
 1648         if (error != 0) {
 1649                 device_printf(aha->dev,
 1650                     "ahafetchtransinfo - Inquire Setup Info Failed %d\n",
 1651                     error);
 1652                 return;
 1653         }
 1654 
 1655         sync_info = setup_info.syncinfo[targ_offset];
 1656 
 1657         if (sync_info.sync == 0)
 1658                 spi->sync_offset = 0;
 1659         else
 1660                 spi->sync_offset = sync_info.offset;
 1661 
 1662         spi->bus_width = MSG_EXT_WDTR_BUS_8_BIT;
 1663 
 1664         if (aha->boardid >= BOARD_1542CF)
 1665                 sync_period = 1000;
 1666         else
 1667                 sync_period = 2000;
 1668         sync_period += 500 * sync_info.period;
 1669 
 1670         /* Convert ns value to standard SCSI sync rate */
 1671         if (spi->sync_offset != 0)
 1672                 spi->sync_period = scsi_calc_syncparam(sync_period);
 1673         else
 1674                 spi->sync_period = 0;
 1675 
 1676         spi->valid = CTS_SPI_VALID_SYNC_RATE
 1677                    | CTS_SPI_VALID_SYNC_OFFSET
 1678                    | CTS_SPI_VALID_BUS_WIDTH;
 1679         xpt_async(AC_TRANSFER_NEG, cts->ccb_h.path, cts);
 1680 }
 1681 
 1682 static void
 1683 ahamapmboxes(void *arg, bus_dma_segment_t *segs, int nseg, int error)
 1684 {
 1685         struct aha_softc* aha;
 1686 
 1687         aha = (struct aha_softc*)arg;
 1688         aha->mailbox_physbase = segs->ds_addr;
 1689 }
 1690 
 1691 static void
 1692 ahamapccbs(void *arg, bus_dma_segment_t *segs, int nseg, int error)
 1693 {
 1694         struct aha_softc* aha;
 1695 
 1696         aha = (struct aha_softc*)arg;
 1697         aha->aha_ccb_physbase = segs->ds_addr;
 1698 }
 1699 
 1700 static void
 1701 ahamapsgs(void *arg, bus_dma_segment_t *segs, int nseg, int error)
 1702 {
 1703 
 1704         struct aha_softc* aha;
 1705 
 1706         aha = (struct aha_softc*)arg;
 1707         SLIST_FIRST(&aha->sg_maps)->sg_physaddr = segs->ds_addr;
 1708 }
 1709 
 1710 static void
 1711 ahapoll(struct cam_sim *sim)
 1712 {
 1713         aha_intr_locked(cam_sim_softc(sim));
 1714 }
 1715 
 1716 static void
 1717 ahatimeout(void *arg)
 1718 {
 1719         struct aha_ccb  *accb;
 1720         union  ccb      *ccb;
 1721         struct aha_softc *aha;
 1722         uint32_t        paddr;
 1723         struct ccb_hdr *ccb_h;
 1724 
 1725         accb = (struct aha_ccb *)arg;
 1726         ccb = accb->ccb;
 1727         aha = (struct aha_softc *)ccb->ccb_h.ccb_aha_ptr;
 1728         mtx_assert(&aha->lock, MA_OWNED);
 1729         xpt_print_path(ccb->ccb_h.path);
 1730         printf("CCB %p - timed out\n", (void *)accb);
 1731 
 1732         if ((accb->flags & ACCB_ACTIVE) == 0) {
 1733                 xpt_print_path(ccb->ccb_h.path);
 1734                 printf("CCB %p - timed out CCB already completed\n",
 1735                     (void *)accb);
 1736                 return;
 1737         }
 1738 
 1739         /*
 1740          * In order to simplify the recovery process, we ask the XPT
 1741          * layer to halt the queue of new transactions and we traverse
 1742          * the list of pending CCBs and remove their timeouts. This
 1743          * means that the driver attempts to clear only one error
 1744          * condition at a time.  In general, timeouts that occur
 1745          * close together are related anyway, so there is no benefit
 1746          * in attempting to handle errors in parallel.  Timeouts will
 1747          * be reinstated when the recovery process ends.
 1748          */
 1749         if ((accb->flags & ACCB_DEVICE_RESET) == 0) {
 1750                 if ((accb->flags & ACCB_RELEASE_SIMQ) == 0) {
 1751                         xpt_freeze_simq(aha->sim, /*count*/1);
 1752                         accb->flags |= ACCB_RELEASE_SIMQ;
 1753                 }
 1754 
 1755                 ccb_h = LIST_FIRST(&aha->pending_ccbs);
 1756                 while (ccb_h != NULL) {
 1757                         struct aha_ccb *pending_accb;
 1758 
 1759                         pending_accb = (struct aha_ccb *)ccb_h->ccb_accb_ptr;
 1760                         callout_stop(&pending_accb->timer);
 1761                         ccb_h = LIST_NEXT(ccb_h, sim_links.le);
 1762                 }
 1763         }
 1764 
 1765         if ((accb->flags & ACCB_DEVICE_RESET) != 0
 1766          || aha->cur_outbox->action_code != AMBO_FREE) {
 1767                 /*
 1768                  * Try a full host adapter/SCSI bus reset.
 1769                  * We do this only if we have already attempted
 1770                  * to clear the condition with a BDR, or we cannot
 1771                  * attempt a BDR for lack of mailbox resources.
 1772                  */
 1773                 ccb->ccb_h.status = CAM_CMD_TIMEOUT;
 1774                 ahareset(aha, /*hardreset*/TRUE);
 1775                 device_printf(aha->dev, "No longer in timeout\n");
 1776         } else {
 1777                 /*
 1778                  * Send a Bus Device Reset message:
 1779                  * The target that is holding up the bus may not
 1780                  * be the same as the one that triggered this timeout
 1781                  * (different commands have different timeout lengths),
 1782                  * but we have no way of determining this from our
 1783                  * timeout handler.  Our strategy here is to queue a
 1784                  * BDR message to the target of the timed out command.
 1785                  * If this fails, we'll get another timeout 2 seconds
 1786                  * later which will attempt a bus reset.
 1787                  */
 1788                 accb->flags |= ACCB_DEVICE_RESET;
 1789                 callout_reset(&accb->timer, 2 * hz, ahatimeout, accb);
 1790                 aha->recovery_accb->hccb.opcode = INITIATOR_BUS_DEV_RESET;
 1791 
 1792                 /* No Data Transfer */
 1793                 aha->recovery_accb->hccb.datain = TRUE;
 1794                 aha->recovery_accb->hccb.dataout = TRUE;
 1795                 aha->recovery_accb->hccb.ahastat = 0;
 1796                 aha->recovery_accb->hccb.sdstat = 0;
 1797                 aha->recovery_accb->hccb.target = ccb->ccb_h.target_id;
 1798 
 1799                 /* Tell the adapter about this command */
 1800                 paddr = ahaccbvtop(aha, aha->recovery_accb);
 1801                 ahautoa24(paddr, aha->cur_outbox->ccb_addr);
 1802                 aha->cur_outbox->action_code = AMBO_START;
 1803                 aha_outb(aha, COMMAND_REG, AOP_START_MBOX);
 1804                 ahanextoutbox(aha);
 1805         }
 1806 }
 1807 
 1808 int
 1809 aha_detach(struct aha_softc *aha)
 1810 {
 1811         mtx_lock(&aha->lock);
 1812         xpt_async(AC_LOST_DEVICE, aha->path, NULL);
 1813         xpt_free_path(aha->path);
 1814         xpt_bus_deregister(cam_sim_path(aha->sim));
 1815         cam_sim_free(aha->sim, /*free_devq*/TRUE);
 1816         mtx_unlock(&aha->lock);
 1817         /* XXX: Drain all timers? */
 1818         return (0);
 1819 }
 1820 MODULE_DEPEND(aha, cam, 1, 1, 1);

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