The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/dev/advansys/adwcam.c

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    1 /*-
    2  * CAM SCSI interface for the the Advanced Systems Inc.
    3  * Second Generation SCSI controllers.
    4  *
    5  * Product specific probe and attach routines can be found in:
    6  * 
    7  * adw_pci.c    ABP[3]940UW, ABP950UW, ABP3940U2W
    8  *
    9  * Copyright (c) 1998, 1999, 2000 Justin Gibbs.
   10  * All rights reserved.
   11  *
   12  * Redistribution and use in source and binary forms, with or without
   13  * modification, are permitted provided that the following conditions
   14  * are met:
   15  * 1. Redistributions of source code must retain the above copyright
   16  *    notice, this list of conditions, and the following disclaimer,
   17  *    without modification.
   18  * 2. The name of the author may not be used to endorse or promote products
   19  *    derived from this software without specific prior written permission.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
   25  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   31  * SUCH DAMAGE.
   32  */
   33 /*
   34  * Ported from:
   35  * advansys.c - Linux Host Driver for AdvanSys SCSI Adapters
   36  *     
   37  * Copyright (c) 1995-1998 Advanced System Products, Inc.
   38  * All Rights Reserved.
   39  *   
   40  * Redistribution and use in source and binary forms, with or without
   41  * modification, are permitted provided that redistributions of source
   42  * code retain the above copyright notice and this comment without
   43  * modification.
   44  */
   45 
   46 #include <sys/cdefs.h>
   47 __FBSDID("$FreeBSD$");
   48 
   49 #include <sys/param.h>
   50 #include <sys/systm.h>
   51 #include <sys/kernel.h>
   52 #include <sys/malloc.h>
   53 #include <sys/lock.h>
   54 #include <sys/module.h>
   55 #include <sys/mutex.h>
   56 #include <sys/bus.h>
   57 
   58 #include <machine/bus.h>
   59 #include <machine/resource.h>
   60 
   61 #include <sys/rman.h>
   62 
   63 #include <cam/cam.h>
   64 #include <cam/cam_ccb.h>
   65 #include <cam/cam_sim.h>
   66 #include <cam/cam_xpt_sim.h>
   67 #include <cam/cam_debug.h>
   68 
   69 #include <cam/scsi/scsi_message.h>
   70 
   71 #include <dev/advansys/adwvar.h>
   72 
   73 /* Definitions for our use of the SIM private CCB area */
   74 #define ccb_acb_ptr spriv_ptr0
   75 #define ccb_adw_ptr spriv_ptr1
   76 
   77 u_long adw_unit;
   78 
   79 static __inline cam_status      adwccbstatus(union ccb*);
   80 static __inline struct acb*     adwgetacb(struct adw_softc *adw);
   81 static __inline void            adwfreeacb(struct adw_softc *adw,
   82                                            struct acb *acb);
   83 
   84 static void             adwmapmem(void *arg, bus_dma_segment_t *segs,
   85                                   int nseg, int error);
   86 static struct sg_map_node*
   87                         adwallocsgmap(struct adw_softc *adw);
   88 static int              adwallocacbs(struct adw_softc *adw);
   89 
   90 static void             adwexecuteacb(void *arg, bus_dma_segment_t *dm_segs,
   91                                       int nseg, int error);
   92 static void             adw_action(struct cam_sim *sim, union ccb *ccb);
   93 static void             adw_poll(struct cam_sim *sim);
   94 static void             adw_async(void *callback_arg, u_int32_t code,
   95                                   struct cam_path *path, void *arg);
   96 static void             adwprocesserror(struct adw_softc *adw, struct acb *acb);
   97 static void             adwtimeout(void *arg);
   98 static void             adw_handle_device_reset(struct adw_softc *adw,
   99                                                 u_int target);
  100 static void             adw_handle_bus_reset(struct adw_softc *adw,
  101                                              int initiated);
  102 
  103 static __inline cam_status
  104 adwccbstatus(union ccb* ccb)
  105 {
  106         return (ccb->ccb_h.status & CAM_STATUS_MASK);
  107 }
  108 
  109 static __inline struct acb*
  110 adwgetacb(struct adw_softc *adw)
  111 {
  112         struct  acb* acb;
  113         int     s;
  114 
  115         s = splcam();
  116         if ((acb = SLIST_FIRST(&adw->free_acb_list)) != NULL) {
  117                 SLIST_REMOVE_HEAD(&adw->free_acb_list, links);
  118         } else if (adw->num_acbs < adw->max_acbs) {
  119                 adwallocacbs(adw);
  120                 acb = SLIST_FIRST(&adw->free_acb_list);
  121                 if (acb == NULL)
  122                         printf("%s: Can't malloc ACB\n", adw_name(adw));
  123                 else {
  124                         SLIST_REMOVE_HEAD(&adw->free_acb_list, links);
  125                 }
  126         }
  127         splx(s);
  128 
  129         return (acb);
  130 }
  131 
  132 static __inline void
  133 adwfreeacb(struct adw_softc *adw, struct acb *acb)
  134 {
  135         int s;
  136 
  137         s = splcam();
  138         if ((acb->state & ACB_ACTIVE) != 0)
  139                 LIST_REMOVE(&acb->ccb->ccb_h, sim_links.le);
  140         if ((acb->state & ACB_RELEASE_SIMQ) != 0)
  141                 acb->ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
  142         else if ((adw->state & ADW_RESOURCE_SHORTAGE) != 0
  143               && (acb->ccb->ccb_h.status & CAM_RELEASE_SIMQ) == 0) {
  144                 acb->ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
  145                 adw->state &= ~ADW_RESOURCE_SHORTAGE;
  146         }
  147         acb->state = ACB_FREE;
  148         SLIST_INSERT_HEAD(&adw->free_acb_list, acb, links);
  149         splx(s);
  150 }
  151 
  152 static void
  153 adwmapmem(void *arg, bus_dma_segment_t *segs, int nseg, int error)
  154 {
  155         bus_addr_t *busaddrp;
  156 
  157         busaddrp = (bus_addr_t *)arg;
  158         *busaddrp = segs->ds_addr;
  159 }
  160 
  161 static struct sg_map_node *
  162 adwallocsgmap(struct adw_softc *adw)
  163 {
  164         struct sg_map_node *sg_map;
  165 
  166         sg_map = malloc(sizeof(*sg_map), M_DEVBUF, M_NOWAIT);
  167 
  168         if (sg_map == NULL)
  169                 return (NULL);
  170 
  171         /* Allocate S/G space for the next batch of ACBS */
  172         if (bus_dmamem_alloc(adw->sg_dmat, (void **)&sg_map->sg_vaddr,
  173                              BUS_DMA_NOWAIT, &sg_map->sg_dmamap) != 0) {
  174                 free(sg_map, M_DEVBUF);
  175                 return (NULL);
  176         }
  177 
  178         SLIST_INSERT_HEAD(&adw->sg_maps, sg_map, links);
  179 
  180         bus_dmamap_load(adw->sg_dmat, sg_map->sg_dmamap, sg_map->sg_vaddr,
  181                         PAGE_SIZE, adwmapmem, &sg_map->sg_physaddr, /*flags*/0);
  182 
  183         bzero(sg_map->sg_vaddr, PAGE_SIZE);
  184         return (sg_map);
  185 }
  186 
  187 /*
  188  * Allocate another chunk of CCB's. Return count of entries added.
  189  * Assumed to be called at splcam().
  190  */
  191 static int
  192 adwallocacbs(struct adw_softc *adw)
  193 {
  194         struct acb *next_acb;
  195         struct sg_map_node *sg_map;
  196         bus_addr_t busaddr;
  197         struct adw_sg_block *blocks;
  198         int newcount;
  199         int i;
  200 
  201         next_acb = &adw->acbs[adw->num_acbs];
  202         sg_map = adwallocsgmap(adw);
  203 
  204         if (sg_map == NULL)
  205                 return (0);
  206 
  207         blocks = sg_map->sg_vaddr;
  208         busaddr = sg_map->sg_physaddr;
  209 
  210         newcount = (PAGE_SIZE / (ADW_SG_BLOCKCNT * sizeof(*blocks)));
  211         for (i = 0; adw->num_acbs < adw->max_acbs && i < newcount; i++) {
  212                 int error;
  213 
  214                 error = bus_dmamap_create(adw->buffer_dmat, /*flags*/0,
  215                                           &next_acb->dmamap);
  216                 if (error != 0)
  217                         break;
  218                 next_acb->queue.scsi_req_baddr = acbvtob(adw, next_acb);
  219                 next_acb->queue.scsi_req_bo = acbvtobo(adw, next_acb);
  220                 next_acb->queue.sense_baddr =
  221                     acbvtob(adw, next_acb) + offsetof(struct acb, sense_data);
  222                 next_acb->sg_blocks = blocks;
  223                 next_acb->sg_busaddr = busaddr;
  224                 next_acb->state = ACB_FREE;
  225                 SLIST_INSERT_HEAD(&adw->free_acb_list, next_acb, links);
  226                 blocks += ADW_SG_BLOCKCNT;
  227                 busaddr += ADW_SG_BLOCKCNT * sizeof(*blocks);
  228                 next_acb++;
  229                 adw->num_acbs++;
  230         }
  231         return (i);
  232 }
  233 
  234 static void
  235 adwexecuteacb(void *arg, bus_dma_segment_t *dm_segs, int nseg, int error)
  236 {
  237         struct   acb *acb;
  238         union    ccb *ccb;
  239         struct   adw_softc *adw;
  240         int      s;
  241 
  242         acb = (struct acb *)arg;
  243         ccb = acb->ccb;
  244         adw = (struct adw_softc *)ccb->ccb_h.ccb_adw_ptr;
  245 
  246         if (error != 0) {
  247                 if (error != EFBIG)
  248                         printf("%s: Unexepected error 0x%x returned from "
  249                                "bus_dmamap_load\n", adw_name(adw), error);
  250                 if (ccb->ccb_h.status == CAM_REQ_INPROG) {
  251                         xpt_freeze_devq(ccb->ccb_h.path, /*count*/1);
  252                         ccb->ccb_h.status = CAM_REQ_TOO_BIG|CAM_DEV_QFRZN;
  253                 }
  254                 adwfreeacb(adw, acb);
  255                 xpt_done(ccb);
  256                 return;
  257         }
  258                 
  259         if (nseg != 0) {
  260                 bus_dmasync_op_t op;
  261 
  262                 acb->queue.data_addr = dm_segs[0].ds_addr;
  263                 acb->queue.data_cnt = ccb->csio.dxfer_len;
  264                 if (nseg > 1) {
  265                         struct adw_sg_block *sg_block;
  266                         struct adw_sg_elm *sg;
  267                         bus_addr_t sg_busaddr;
  268                         u_int sg_index;
  269                         bus_dma_segment_t *end_seg;
  270 
  271                         end_seg = dm_segs + nseg;
  272 
  273                         sg_busaddr = acb->sg_busaddr;
  274                         sg_index = 0;
  275                         /* Copy the segments into our SG list */
  276                         for (sg_block = acb->sg_blocks;; sg_block++) {
  277                                 u_int i;
  278 
  279                                 sg = sg_block->sg_list;
  280                                 for (i = 0; i < ADW_NO_OF_SG_PER_BLOCK; i++) {
  281                                         if (dm_segs >= end_seg)
  282                                                 break;
  283                                     
  284                                         sg->sg_addr = dm_segs->ds_addr;
  285                                         sg->sg_count = dm_segs->ds_len;
  286                                         sg++;
  287                                         dm_segs++;
  288                                 }
  289                                 sg_block->sg_cnt = i;
  290                                 sg_index += i;
  291                                 if (dm_segs == end_seg) {
  292                                         sg_block->sg_busaddr_next = 0;
  293                                         break;
  294                                 } else {
  295                                         sg_busaddr +=
  296                                             sizeof(struct adw_sg_block);
  297                                         sg_block->sg_busaddr_next = sg_busaddr;
  298                                 }
  299                         }
  300                         acb->queue.sg_real_addr = acb->sg_busaddr;
  301                 } else {
  302                         acb->queue.sg_real_addr = 0;
  303                 }
  304 
  305                 if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
  306                         op = BUS_DMASYNC_PREREAD;
  307                 else
  308                         op = BUS_DMASYNC_PREWRITE;
  309 
  310                 bus_dmamap_sync(adw->buffer_dmat, acb->dmamap, op);
  311 
  312         } else {
  313                 acb->queue.data_addr = 0;
  314                 acb->queue.data_cnt = 0;
  315                 acb->queue.sg_real_addr = 0;
  316         }
  317 
  318         s = splcam();
  319 
  320         /*
  321          * Last time we need to check if this CCB needs to
  322          * be aborted.
  323          */
  324         if (ccb->ccb_h.status != CAM_REQ_INPROG) {
  325                 if (nseg != 0)
  326                         bus_dmamap_unload(adw->buffer_dmat, acb->dmamap);
  327                 adwfreeacb(adw, acb);
  328                 xpt_done(ccb);
  329                 splx(s);
  330                 return;
  331         }
  332 
  333         acb->state |= ACB_ACTIVE;
  334         ccb->ccb_h.status |= CAM_SIM_QUEUED;
  335         LIST_INSERT_HEAD(&adw->pending_ccbs, &ccb->ccb_h, sim_links.le);
  336         ccb->ccb_h.timeout_ch =
  337             timeout(adwtimeout, (caddr_t)acb,
  338                     (ccb->ccb_h.timeout * hz) / 1000);
  339 
  340         adw_send_acb(adw, acb, acbvtob(adw, acb));
  341 
  342         splx(s);
  343 }
  344 
  345 static void
  346 adw_action(struct cam_sim *sim, union ccb *ccb)
  347 {
  348         struct  adw_softc *adw;
  349 
  350         CAM_DEBUG(ccb->ccb_h.path, CAM_DEBUG_TRACE, ("adw_action\n"));
  351         
  352         adw = (struct adw_softc *)cam_sim_softc(sim);
  353 
  354         switch (ccb->ccb_h.func_code) {
  355         /* Common cases first */
  356         case XPT_SCSI_IO:       /* Execute the requested I/O operation */
  357         {
  358                 struct  ccb_scsiio *csio;
  359                 struct  ccb_hdr *ccbh;
  360                 struct  acb *acb;
  361 
  362                 csio = &ccb->csio;
  363                 ccbh = &ccb->ccb_h;
  364 
  365                 /* Max supported CDB length is 12 bytes */
  366                 if (csio->cdb_len > 12) { 
  367                         ccb->ccb_h.status = CAM_REQ_INVALID;
  368                         xpt_done(ccb);
  369                         return;
  370                 }
  371 
  372                 if ((acb = adwgetacb(adw)) == NULL) {
  373                         int s;
  374         
  375                         s = splcam();
  376                         adw->state |= ADW_RESOURCE_SHORTAGE;
  377                         splx(s);
  378                         xpt_freeze_simq(sim, /*count*/1);
  379                         ccb->ccb_h.status = CAM_REQUEUE_REQ;
  380                         xpt_done(ccb);
  381                         return;
  382                 }
  383 
  384                 /* Link acb and ccb so we can find one from the other */
  385                 acb->ccb = ccb;
  386                 ccb->ccb_h.ccb_acb_ptr = acb;
  387                 ccb->ccb_h.ccb_adw_ptr = adw;
  388 
  389                 acb->queue.cntl = 0;
  390                 acb->queue.target_cmd = 0;
  391                 acb->queue.target_id = ccb->ccb_h.target_id;
  392                 acb->queue.target_lun = ccb->ccb_h.target_lun;
  393 
  394                 acb->queue.mflag = 0;
  395                 acb->queue.sense_len =
  396                         MIN(csio->sense_len, sizeof(acb->sense_data));
  397                 acb->queue.cdb_len = csio->cdb_len;
  398                 if ((ccb->ccb_h.flags & CAM_TAG_ACTION_VALID) != 0) {
  399                         switch (csio->tag_action) {
  400                         case MSG_SIMPLE_Q_TAG:
  401                                 acb->queue.scsi_cntl = ADW_QSC_SIMPLE_Q_TAG;
  402                                 break;
  403                         case MSG_HEAD_OF_Q_TAG:
  404                                 acb->queue.scsi_cntl = ADW_QSC_HEAD_OF_Q_TAG;
  405                                 break;
  406                         case MSG_ORDERED_Q_TAG:
  407                                 acb->queue.scsi_cntl = ADW_QSC_ORDERED_Q_TAG;
  408                                 break;
  409                         default:
  410                                 acb->queue.scsi_cntl = ADW_QSC_NO_TAGMSG;
  411                                 break;
  412                         }
  413                 } else
  414                         acb->queue.scsi_cntl = ADW_QSC_NO_TAGMSG;
  415 
  416                 if ((ccb->ccb_h.flags & CAM_DIS_DISCONNECT) != 0)
  417                         acb->queue.scsi_cntl |= ADW_QSC_NO_DISC;
  418 
  419                 acb->queue.done_status = 0;
  420                 acb->queue.scsi_status = 0;
  421                 acb->queue.host_status = 0;
  422                 acb->queue.sg_wk_ix = 0;
  423                 if ((ccb->ccb_h.flags & CAM_CDB_POINTER) != 0) {
  424                         if ((ccb->ccb_h.flags & CAM_CDB_PHYS) == 0) {
  425                                 bcopy(csio->cdb_io.cdb_ptr,
  426                                       acb->queue.cdb, csio->cdb_len);
  427                         } else {
  428                                 /* I guess I could map it in... */
  429                                 ccb->ccb_h.status = CAM_REQ_INVALID;
  430                                 adwfreeacb(adw, acb);
  431                                 xpt_done(ccb);
  432                                 return;
  433                         }
  434                 } else {
  435                         bcopy(csio->cdb_io.cdb_bytes,
  436                               acb->queue.cdb, csio->cdb_len);
  437                 }
  438 
  439                 /*
  440                  * If we have any data to send with this command,
  441                  * map it into bus space.
  442                  */
  443                 if ((ccbh->flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
  444                         if ((ccbh->flags & CAM_SCATTER_VALID) == 0) {
  445                                 /*
  446                                  * We've been given a pointer
  447                                  * to a single buffer.
  448                                  */
  449                                 if ((ccbh->flags & CAM_DATA_PHYS) == 0) {
  450                                         int s;
  451                                         int error;
  452 
  453                                         s = splsoftvm();
  454                                         error =
  455                                             bus_dmamap_load(adw->buffer_dmat,
  456                                                             acb->dmamap,
  457                                                             csio->data_ptr,
  458                                                             csio->dxfer_len,
  459                                                             adwexecuteacb,
  460                                                             acb, /*flags*/0);
  461                                         if (error == EINPROGRESS) {
  462                                                 /*
  463                                                  * So as to maintain ordering,
  464                                                  * freeze the controller queue
  465                                                  * until our mapping is
  466                                                  * returned.
  467                                                  */
  468                                                 xpt_freeze_simq(sim, 1);
  469                                                 acb->state |= CAM_RELEASE_SIMQ;
  470                                         }
  471                                         splx(s);
  472                                 } else {
  473                                         struct bus_dma_segment seg; 
  474 
  475                                         /* Pointer to physical buffer */
  476                                         seg.ds_addr =
  477                                             (bus_addr_t)csio->data_ptr;
  478                                         seg.ds_len = csio->dxfer_len;
  479                                         adwexecuteacb(acb, &seg, 1, 0);
  480                                 }
  481                         } else {
  482                                 struct bus_dma_segment *segs;
  483 
  484                                 if ((ccbh->flags & CAM_DATA_PHYS) != 0)
  485                                         panic("adw_action - Physical "
  486                                               "segment pointers "
  487                                               "unsupported");
  488 
  489                                 if ((ccbh->flags&CAM_SG_LIST_PHYS)==0)
  490                                         panic("adw_action - Virtual "
  491                                               "segment addresses "
  492                                               "unsupported");
  493 
  494                                 /* Just use the segments provided */
  495                                 segs = (struct bus_dma_segment *)csio->data_ptr;
  496                                 adwexecuteacb(acb, segs, csio->sglist_cnt,
  497                                               (csio->sglist_cnt < ADW_SGSIZE)
  498                                               ? 0 : EFBIG);
  499                         }
  500                 } else {
  501                         adwexecuteacb(acb, NULL, 0, 0);
  502                 }
  503                 break;
  504         }
  505         case XPT_RESET_DEV:     /* Bus Device Reset the specified SCSI device */
  506         {
  507                 adw_idle_cmd_status_t status;
  508 
  509                 status = adw_idle_cmd_send(adw, ADW_IDLE_CMD_DEVICE_RESET,
  510                                            ccb->ccb_h.target_id);
  511                 if (status == ADW_IDLE_CMD_SUCCESS) {
  512                         ccb->ccb_h.status = CAM_REQ_CMP;
  513                         if (bootverbose) {
  514                                 xpt_print_path(ccb->ccb_h.path);
  515                                 printf("BDR Delivered\n");
  516                         }
  517                 } else
  518                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
  519                 xpt_done(ccb);
  520                 break;
  521         }
  522         case XPT_ABORT:                 /* Abort the specified CCB */
  523                 /* XXX Implement */
  524                 ccb->ccb_h.status = CAM_REQ_INVALID;
  525                 xpt_done(ccb);
  526                 break;
  527         case XPT_SET_TRAN_SETTINGS:
  528         {
  529                 struct    ccb_trans_settings *cts;
  530                 u_int     target_mask;
  531                 int       s;
  532 
  533                 cts = &ccb->cts;
  534                 target_mask = 0x01 << ccb->ccb_h.target_id;
  535 
  536                 s = splcam();
  537                 if ((cts->flags & CCB_TRANS_CURRENT_SETTINGS) != 0) {
  538                         u_int sdtrdone;
  539 
  540                         sdtrdone = adw_lram_read_16(adw, ADW_MC_SDTR_DONE);
  541                         if ((cts->valid & CCB_TRANS_DISC_VALID) != 0) {
  542                                 u_int discenb;
  543 
  544                                 discenb =
  545                                     adw_lram_read_16(adw, ADW_MC_DISC_ENABLE);
  546 
  547                                 if ((cts->flags & CCB_TRANS_DISC_ENB) != 0)
  548                                         discenb |= target_mask;
  549                                 else
  550                                         discenb &= ~target_mask;
  551 
  552                                 adw_lram_write_16(adw, ADW_MC_DISC_ENABLE,
  553                                                   discenb);
  554                         }
  555                 
  556                         if ((cts->valid & CCB_TRANS_TQ_VALID) != 0) {
  557 
  558                                 if ((cts->flags & CCB_TRANS_TAG_ENB) != 0)
  559                                         adw->tagenb |= target_mask;
  560                                 else
  561                                         adw->tagenb &= ~target_mask;
  562                         }       
  563 
  564                         if ((cts->valid & CCB_TRANS_BUS_WIDTH_VALID) != 0) {
  565                                 u_int wdtrenb_orig;
  566                                 u_int wdtrenb;
  567                                 u_int wdtrdone;
  568 
  569                                 wdtrenb_orig =
  570                                     adw_lram_read_16(adw, ADW_MC_WDTR_ABLE);
  571                                 wdtrenb = wdtrenb_orig;
  572                                 wdtrdone = adw_lram_read_16(adw,
  573                                                             ADW_MC_WDTR_DONE);
  574                                 switch (cts->bus_width) {
  575                                 case MSG_EXT_WDTR_BUS_32_BIT:
  576                                 case MSG_EXT_WDTR_BUS_16_BIT:
  577                                         wdtrenb |= target_mask;
  578                                         break;
  579                                 case MSG_EXT_WDTR_BUS_8_BIT:
  580                                 default:
  581                                         wdtrenb &= ~target_mask;
  582                                         break;
  583                                 }
  584                                 if (wdtrenb != wdtrenb_orig) {
  585                                         adw_lram_write_16(adw,
  586                                                           ADW_MC_WDTR_ABLE,
  587                                                           wdtrenb);
  588                                         wdtrdone &= ~target_mask;
  589                                         adw_lram_write_16(adw,
  590                                                           ADW_MC_WDTR_DONE,
  591                                                           wdtrdone);
  592                                         /* Wide negotiation forces async */
  593                                         sdtrdone &= ~target_mask;
  594                                         adw_lram_write_16(adw,
  595                                                           ADW_MC_SDTR_DONE,
  596                                                           sdtrdone);
  597                                 }
  598                         }
  599 
  600                         if (((cts->valid & CCB_TRANS_SYNC_RATE_VALID) != 0)
  601                          || ((cts->valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0)) {
  602                                 u_int sdtr_orig;
  603                                 u_int sdtr;
  604                                 u_int sdtrable_orig;
  605                                 u_int sdtrable;
  606 
  607                                 sdtr = adw_get_chip_sdtr(adw,
  608                                                          ccb->ccb_h.target_id);
  609                                 sdtr_orig = sdtr;
  610                                 sdtrable = adw_lram_read_16(adw,
  611                                                             ADW_MC_SDTR_ABLE);
  612                                 sdtrable_orig = sdtrable;
  613 
  614                                 if ((cts->valid
  615                                    & CCB_TRANS_SYNC_RATE_VALID) != 0) {
  616 
  617                                         sdtr =
  618                                             adw_find_sdtr(adw,
  619                                                           cts->sync_period);
  620                                 }
  621                                         
  622                                 if ((cts->valid
  623                                    & CCB_TRANS_SYNC_OFFSET_VALID) != 0) {
  624                                         if (cts->sync_offset == 0)
  625                                                 sdtr = ADW_MC_SDTR_ASYNC;
  626                                 }
  627 
  628                                 if (sdtr == ADW_MC_SDTR_ASYNC)
  629                                         sdtrable &= ~target_mask;
  630                                 else
  631                                         sdtrable |= target_mask;
  632                                 if (sdtr != sdtr_orig
  633                                  || sdtrable != sdtrable_orig) {
  634                                         adw_set_chip_sdtr(adw,
  635                                                           ccb->ccb_h.target_id,
  636                                                           sdtr);
  637                                         sdtrdone &= ~target_mask;
  638                                         adw_lram_write_16(adw, ADW_MC_SDTR_ABLE,
  639                                                           sdtrable);
  640                                         adw_lram_write_16(adw, ADW_MC_SDTR_DONE,
  641                                                           sdtrdone);
  642                                         
  643                                 }
  644                         } 
  645                 }
  646                 splx(s);
  647                 ccb->ccb_h.status = CAM_REQ_CMP;
  648                 xpt_done(ccb);
  649                 break;
  650         }
  651         case XPT_GET_TRAN_SETTINGS:
  652         /* Get default/user set transfer settings for the target */
  653         {
  654                 struct  ccb_trans_settings *cts;
  655                 u_int   target_mask;
  656  
  657                 cts = &ccb->cts;
  658                 target_mask = 0x01 << ccb->ccb_h.target_id;
  659                 if ((cts->flags & CCB_TRANS_USER_SETTINGS) != 0) { 
  660                         u_int mc_sdtr;
  661 
  662                         cts->flags = 0;
  663                         if ((adw->user_discenb & target_mask) != 0)
  664                                 cts->flags |= CCB_TRANS_DISC_ENB;
  665 
  666                         if ((adw->user_tagenb & target_mask) != 0)
  667                                 cts->flags |= CCB_TRANS_TAG_ENB;
  668 
  669                         if ((adw->user_wdtr & target_mask) != 0)
  670                                 cts->bus_width = MSG_EXT_WDTR_BUS_16_BIT;
  671                         else
  672                                 cts->bus_width = MSG_EXT_WDTR_BUS_8_BIT;
  673 
  674                         mc_sdtr = adw_get_user_sdtr(adw, ccb->ccb_h.target_id);
  675                         cts->sync_period = adw_find_period(adw, mc_sdtr);
  676                         if (cts->sync_period != 0)
  677                                 cts->sync_offset = 15; /* XXX ??? */
  678                         else
  679                                 cts->sync_offset = 0;
  680 
  681                         cts->valid = CCB_TRANS_SYNC_RATE_VALID
  682                                    | CCB_TRANS_SYNC_OFFSET_VALID
  683                                    | CCB_TRANS_BUS_WIDTH_VALID
  684                                    | CCB_TRANS_DISC_VALID
  685                                    | CCB_TRANS_TQ_VALID;
  686                         ccb->ccb_h.status = CAM_REQ_CMP;
  687                 } else {
  688                         u_int targ_tinfo;
  689 
  690                         cts->flags = 0;
  691                         if ((adw_lram_read_16(adw, ADW_MC_DISC_ENABLE)
  692                           & target_mask) != 0)
  693                                 cts->flags |= CCB_TRANS_DISC_ENB;
  694 
  695                         if ((adw->tagenb & target_mask) != 0)
  696                                 cts->flags |= CCB_TRANS_TAG_ENB;
  697 
  698                         targ_tinfo =
  699                             adw_lram_read_16(adw,
  700                                              ADW_MC_DEVICE_HSHK_CFG_TABLE
  701                                              + (2 * ccb->ccb_h.target_id));
  702 
  703                         if ((targ_tinfo & ADW_HSHK_CFG_WIDE_XFR) != 0)
  704                                 cts->bus_width = MSG_EXT_WDTR_BUS_16_BIT;
  705                         else
  706                                 cts->bus_width = MSG_EXT_WDTR_BUS_8_BIT;
  707 
  708                         cts->sync_period =
  709                             adw_hshk_cfg_period_factor(targ_tinfo);
  710 
  711                         cts->sync_offset = targ_tinfo & ADW_HSHK_CFG_OFFSET;
  712                         if (cts->sync_period == 0)
  713                                 cts->sync_offset = 0;
  714 
  715                         if (cts->sync_offset == 0)
  716                                 cts->sync_period = 0;
  717                 }
  718                 cts->valid = CCB_TRANS_SYNC_RATE_VALID
  719                            | CCB_TRANS_SYNC_OFFSET_VALID
  720                            | CCB_TRANS_BUS_WIDTH_VALID
  721                            | CCB_TRANS_DISC_VALID
  722                            | CCB_TRANS_TQ_VALID;
  723                 ccb->ccb_h.status = CAM_REQ_CMP;
  724                 xpt_done(ccb);
  725                 break;
  726         }
  727         case XPT_CALC_GEOMETRY:
  728         {
  729                 /*
  730                  * XXX Use Adaptec translation until I find out how to
  731                  *     get this information from the card.
  732                  */
  733                 cam_calc_geometry(&ccb->ccg, /*extended*/1); 
  734                 xpt_done(ccb);
  735                 break;
  736         }
  737         case XPT_RESET_BUS:             /* Reset the specified SCSI bus */
  738         {
  739                 int failure;
  740 
  741                 failure = adw_reset_bus(adw);
  742                 if (failure != 0) {
  743                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
  744                 } else {
  745                         if (bootverbose) {
  746                                 xpt_print_path(adw->path);
  747                                 printf("Bus Reset Delivered\n");
  748                         }
  749                         ccb->ccb_h.status = CAM_REQ_CMP;
  750                 }
  751                 xpt_done(ccb);
  752                 break;
  753         }
  754         case XPT_TERM_IO:               /* Terminate the I/O process */
  755                 /* XXX Implement */
  756                 ccb->ccb_h.status = CAM_REQ_INVALID;
  757                 xpt_done(ccb);
  758                 break;
  759         case XPT_PATH_INQ:              /* Path routing inquiry */
  760         {
  761                 struct ccb_pathinq *cpi = &ccb->cpi;
  762                 
  763                 cpi->version_num = 1;
  764                 cpi->hba_inquiry = PI_WIDE_16|PI_SDTR_ABLE|PI_TAG_ABLE;
  765                 cpi->target_sprt = 0;
  766                 cpi->hba_misc = 0;
  767                 cpi->hba_eng_cnt = 0;
  768                 cpi->max_target = ADW_MAX_TID;
  769                 cpi->max_lun = ADW_MAX_LUN;
  770                 cpi->initiator_id = adw->initiator_id;
  771                 cpi->bus_id = cam_sim_bus(sim);
  772                 cpi->base_transfer_speed = 3300;
  773                 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
  774                 strncpy(cpi->hba_vid, "AdvanSys", HBA_IDLEN);
  775                 strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
  776                 cpi->unit_number = cam_sim_unit(sim);
  777                 cpi->ccb_h.status = CAM_REQ_CMP;
  778                 xpt_done(ccb);
  779                 break;
  780         }
  781         default:
  782                 ccb->ccb_h.status = CAM_REQ_INVALID;
  783                 xpt_done(ccb);
  784                 break;
  785         }
  786 }
  787 
  788 static void
  789 adw_poll(struct cam_sim *sim)
  790 {
  791         adw_intr(cam_sim_softc(sim));
  792 }
  793 
  794 static void
  795 adw_async(void *callback_arg, u_int32_t code, struct cam_path *path, void *arg)
  796 {
  797 }
  798 
  799 struct adw_softc *
  800 adw_alloc(device_t dev, struct resource *regs, int regs_type, int regs_id)
  801 {
  802         struct   adw_softc *adw;
  803         int      i;
  804    
  805         /*
  806          * Allocate a storage area for us
  807          */
  808         adw = malloc(sizeof(struct adw_softc), M_DEVBUF, M_NOWAIT | M_ZERO);
  809         if (adw == NULL) {
  810                 printf("adw%d: cannot malloc!\n", device_get_unit(dev));
  811                 return NULL;
  812         }
  813         LIST_INIT(&adw->pending_ccbs);
  814         SLIST_INIT(&adw->sg_maps);
  815         adw->device = dev;
  816         adw->unit = device_get_unit(dev);
  817         adw->regs_res_type = regs_type;
  818         adw->regs_res_id = regs_id;
  819         adw->regs = regs;
  820         adw->tag = rman_get_bustag(regs);
  821         adw->bsh = rman_get_bushandle(regs);
  822         i = adw->unit / 10;
  823         adw->name = malloc(sizeof("adw") + i + 1, M_DEVBUF, M_NOWAIT);
  824         if (adw->name == NULL) {
  825                 printf("adw%d: cannot malloc name!\n", adw->unit);
  826                 free(adw, M_DEVBUF);
  827                 return NULL;
  828         }
  829         sprintf(adw->name, "adw%d", adw->unit);
  830         return(adw);
  831 }
  832 
  833 void
  834 adw_free(struct adw_softc *adw)
  835 {
  836         switch (adw->init_level) {
  837         case 9:
  838         {
  839                 struct sg_map_node *sg_map;
  840 
  841                 while ((sg_map = SLIST_FIRST(&adw->sg_maps)) != NULL) {
  842                         SLIST_REMOVE_HEAD(&adw->sg_maps, links);
  843                         bus_dmamap_unload(adw->sg_dmat,
  844                                           sg_map->sg_dmamap);
  845                         bus_dmamem_free(adw->sg_dmat, sg_map->sg_vaddr,
  846                                         sg_map->sg_dmamap);
  847                         free(sg_map, M_DEVBUF);
  848                 }
  849                 bus_dma_tag_destroy(adw->sg_dmat);
  850         }
  851         case 8:
  852                 bus_dmamap_unload(adw->acb_dmat, adw->acb_dmamap);
  853         case 7:
  854                 bus_dmamem_free(adw->acb_dmat, adw->acbs,
  855                                 adw->acb_dmamap);
  856                 bus_dmamap_destroy(adw->acb_dmat, adw->acb_dmamap);
  857         case 6:
  858                 bus_dma_tag_destroy(adw->acb_dmat);
  859         case 5:
  860                 bus_dmamap_unload(adw->carrier_dmat, adw->carrier_dmamap);
  861         case 4:
  862                 bus_dmamem_free(adw->carrier_dmat, adw->carriers,
  863                                 adw->carrier_dmamap);
  864                 bus_dmamap_destroy(adw->carrier_dmat, adw->carrier_dmamap);
  865         case 3:
  866                 bus_dma_tag_destroy(adw->carrier_dmat);
  867         case 2:
  868                 bus_dma_tag_destroy(adw->buffer_dmat);
  869         case 1:
  870                 bus_dma_tag_destroy(adw->parent_dmat);
  871         case 0:
  872                 break;
  873         }
  874         
  875         if (adw->regs != NULL)
  876                 bus_release_resource(adw->device,
  877                                      adw->regs_res_type,
  878                                      adw->regs_res_id,
  879                                      adw->regs);
  880 
  881         if (adw->irq != NULL)
  882                 bus_release_resource(adw->device,
  883                                      adw->irq_res_type,
  884                                      0, adw->irq);
  885 
  886         if (adw->sim != NULL) {
  887                 if (adw->path != NULL) {
  888                         xpt_async(AC_LOST_DEVICE, adw->path, NULL);
  889                         xpt_free_path(adw->path);
  890                 }
  891                 xpt_bus_deregister(cam_sim_path(adw->sim));
  892                 cam_sim_free(adw->sim, /*free_devq*/TRUE);
  893         }
  894         free(adw->name, M_DEVBUF);
  895         free(adw, M_DEVBUF);
  896 }
  897 
  898 int
  899 adw_init(struct adw_softc *adw)
  900 {
  901         struct    adw_eeprom eep_config;
  902         u_int     tid;
  903         u_int     i;
  904         u_int16_t checksum;
  905         u_int16_t scsicfg1;
  906 
  907         checksum = adw_eeprom_read(adw, &eep_config);
  908         bcopy(eep_config.serial_number, adw->serial_number,
  909               sizeof(adw->serial_number));
  910         if (checksum != eep_config.checksum) {
  911                 u_int16_t serial_number[3];
  912 
  913                 adw->flags |= ADW_EEPROM_FAILED;
  914                 printf("%s: EEPROM checksum failed.  Restoring Defaults\n",
  915                        adw_name(adw));
  916 
  917                 /*
  918                  * Restore the default EEPROM settings.
  919                  * Assume the 6 byte board serial number that was read
  920                  * from EEPROM is correct even if the EEPROM checksum
  921                  * failed.
  922                  */
  923                 bcopy(adw->default_eeprom, &eep_config, sizeof(eep_config));
  924                 bcopy(adw->serial_number, eep_config.serial_number,
  925                       sizeof(serial_number));
  926                 adw_eeprom_write(adw, &eep_config);
  927         }
  928 
  929         /* Pull eeprom information into our softc. */
  930         adw->bios_ctrl = eep_config.bios_ctrl;
  931         adw->user_wdtr = eep_config.wdtr_able;
  932         for (tid = 0; tid < ADW_MAX_TID; tid++) {
  933                 u_int     mc_sdtr;
  934                 u_int16_t tid_mask;
  935 
  936                 tid_mask = 0x1 << tid;
  937                 if ((adw->features & ADW_ULTRA) != 0) {
  938                         /*
  939                          * Ultra chips store sdtr and ultraenb
  940                          * bits in their seeprom, so we must
  941                          * construct valid mc_sdtr entries for
  942                          * indirectly.
  943                          */
  944                         if (eep_config.sync1.sync_enable & tid_mask) {
  945                                 if (eep_config.sync2.ultra_enable & tid_mask)
  946                                         mc_sdtr = ADW_MC_SDTR_20;
  947                                 else
  948                                         mc_sdtr = ADW_MC_SDTR_10;
  949                         } else
  950                                 mc_sdtr = ADW_MC_SDTR_ASYNC;
  951                 } else {
  952                         switch (ADW_TARGET_GROUP(tid)) {
  953                         case 3:
  954                                 mc_sdtr = eep_config.sync4.sdtr4;
  955                                 break;
  956                         case 2:
  957                                 mc_sdtr = eep_config.sync3.sdtr3;
  958                                 break;
  959                         case 1:
  960                                 mc_sdtr = eep_config.sync2.sdtr2;
  961                                 break;
  962                         default: /* Shut up compiler */
  963                         case 0:
  964                                 mc_sdtr = eep_config.sync1.sdtr1;
  965                                 break;
  966                         }
  967                         mc_sdtr >>= ADW_TARGET_GROUP_SHIFT(tid);
  968                         mc_sdtr &= 0xFF;
  969                 }
  970                 adw_set_user_sdtr(adw, tid, mc_sdtr);
  971         }
  972         adw->user_tagenb = eep_config.tagqng_able;
  973         adw->user_discenb = eep_config.disc_enable;
  974         adw->max_acbs = eep_config.max_host_qng;
  975         adw->initiator_id = (eep_config.adapter_scsi_id & ADW_MAX_TID);
  976 
  977         /*
  978          * Sanity check the number of host openings.
  979          */
  980         if (adw->max_acbs > ADW_DEF_MAX_HOST_QNG)
  981                 adw->max_acbs = ADW_DEF_MAX_HOST_QNG;
  982         else if (adw->max_acbs < ADW_DEF_MIN_HOST_QNG) {
  983                 /* If the value is zero, assume it is uninitialized. */
  984                 if (adw->max_acbs == 0)
  985                         adw->max_acbs = ADW_DEF_MAX_HOST_QNG;
  986                 else
  987                         adw->max_acbs = ADW_DEF_MIN_HOST_QNG;
  988         }
  989         
  990         scsicfg1 = 0;
  991         if ((adw->features & ADW_ULTRA2) != 0) {
  992                 switch (eep_config.termination_lvd) {
  993                 default:
  994                         printf("%s: Invalid EEPROM LVD Termination Settings.\n",
  995                                adw_name(adw));
  996                         printf("%s: Reverting to Automatic LVD Termination\n",
  997                                adw_name(adw));
  998                         /* FALLTHROUGH */
  999                 case ADW_EEPROM_TERM_AUTO:
 1000                         break;
 1001                 case ADW_EEPROM_TERM_BOTH_ON:
 1002                         scsicfg1 |= ADW2_SCSI_CFG1_TERM_LVD_LO;
 1003                         /* FALLTHROUGH */
 1004                 case ADW_EEPROM_TERM_HIGH_ON:
 1005                         scsicfg1 |= ADW2_SCSI_CFG1_TERM_LVD_HI;
 1006                         /* FALLTHROUGH */
 1007                 case ADW_EEPROM_TERM_OFF:
 1008                         scsicfg1 |= ADW2_SCSI_CFG1_DIS_TERM_DRV;
 1009                         break;
 1010                 }
 1011         }
 1012 
 1013         switch (eep_config.termination_se) {
 1014         default:
 1015                 printf("%s: Invalid SE EEPROM Termination Settings.\n",
 1016                        adw_name(adw));
 1017                 printf("%s: Reverting to Automatic SE Termination\n",
 1018                        adw_name(adw));
 1019                 /* FALLTHROUGH */
 1020         case ADW_EEPROM_TERM_AUTO:
 1021                 break;
 1022         case ADW_EEPROM_TERM_BOTH_ON:
 1023                 scsicfg1 |= ADW_SCSI_CFG1_TERM_CTL_L;
 1024                 /* FALLTHROUGH */
 1025         case ADW_EEPROM_TERM_HIGH_ON:
 1026                 scsicfg1 |= ADW_SCSI_CFG1_TERM_CTL_H;
 1027                 /* FALLTHROUGH */
 1028         case ADW_EEPROM_TERM_OFF:
 1029                 scsicfg1 |= ADW_SCSI_CFG1_TERM_CTL_MANUAL;
 1030                 break;
 1031         }
 1032         printf("%s: SCSI ID %d, ", adw_name(adw), adw->initiator_id);
 1033 
 1034         /* DMA tag for mapping buffers into device visible space. */
 1035         if (bus_dma_tag_create(
 1036                         /* parent       */ adw->parent_dmat,
 1037                         /* alignment    */ 1,
 1038                         /* boundary     */ 0,
 1039                         /* lowaddr      */ BUS_SPACE_MAXADDR_32BIT,
 1040                         /* highaddr     */ BUS_SPACE_MAXADDR,
 1041                         /* filter       */ NULL,
 1042                         /* filterarg    */ NULL,
 1043                         /* maxsize      */ MAXBSIZE,
 1044                         /* nsegments    */ ADW_SGSIZE,
 1045                         /* maxsegsz     */ BUS_SPACE_MAXSIZE_32BIT,
 1046                         /* flags        */ BUS_DMA_ALLOCNOW,
 1047                         /* lockfunc     */ busdma_lock_mutex,
 1048                         /* lockarg      */ &Giant,
 1049                         &adw->buffer_dmat) != 0) {
 1050                 return (ENOMEM);
 1051         }
 1052 
 1053         adw->init_level++;
 1054 
 1055         /* DMA tag for our ccb carrier structures */
 1056         if (bus_dma_tag_create(
 1057                         /* parent       */ adw->parent_dmat,
 1058                         /* alignment    */ 0x10,
 1059                         /* boundary     */ 0,
 1060                         /* lowaddr      */ BUS_SPACE_MAXADDR_32BIT,
 1061                         /* highaddr     */ BUS_SPACE_MAXADDR,
 1062                         /* filter       */ NULL,
 1063                         /* filterarg    */ NULL,
 1064                         /* maxsize      */ (adw->max_acbs +
 1065                                             ADW_NUM_CARRIER_QUEUES + 1) *
 1066                                             sizeof(struct adw_carrier),
 1067                         /* nsegments    */ 1,
 1068                         /* maxsegsz     */ BUS_SPACE_MAXSIZE_32BIT,
 1069                         /* flags        */ 0,
 1070                         /* lockfunc     */ busdma_lock_mutex,
 1071                         /* lockarg      */ &Giant,
 1072                         &adw->carrier_dmat) != 0) {
 1073                 return (ENOMEM);
 1074         }
 1075 
 1076         adw->init_level++;
 1077 
 1078         /* Allocation for our ccb carrier structures */
 1079         if (bus_dmamem_alloc(adw->carrier_dmat, (void **)&adw->carriers,
 1080                              BUS_DMA_NOWAIT, &adw->carrier_dmamap) != 0) {
 1081                 return (ENOMEM);
 1082         }
 1083 
 1084         adw->init_level++;
 1085 
 1086         /* And permanently map them */
 1087         bus_dmamap_load(adw->carrier_dmat, adw->carrier_dmamap,
 1088                         adw->carriers,
 1089                         (adw->max_acbs + ADW_NUM_CARRIER_QUEUES + 1)
 1090                          * sizeof(struct adw_carrier),
 1091                         adwmapmem, &adw->carrier_busbase, /*flags*/0);
 1092 
 1093         /* Clear them out. */
 1094         bzero(adw->carriers, (adw->max_acbs + ADW_NUM_CARRIER_QUEUES + 1)
 1095                              * sizeof(struct adw_carrier));
 1096 
 1097         /* Setup our free carrier list */
 1098         adw->free_carriers = adw->carriers;
 1099         for (i = 0; i < adw->max_acbs + ADW_NUM_CARRIER_QUEUES; i++) {
 1100                 adw->carriers[i].carr_offset =
 1101                         carriervtobo(adw, &adw->carriers[i]);
 1102                 adw->carriers[i].carr_ba = 
 1103                         carriervtob(adw, &adw->carriers[i]);
 1104                 adw->carriers[i].areq_ba = 0;
 1105                 adw->carriers[i].next_ba = 
 1106                         carriervtobo(adw, &adw->carriers[i+1]);
 1107         }
 1108         /* Terminal carrier.  Never leaves the freelist */
 1109         adw->carriers[i].carr_offset =
 1110                 carriervtobo(adw, &adw->carriers[i]);
 1111         adw->carriers[i].carr_ba = 
 1112                 carriervtob(adw, &adw->carriers[i]);
 1113         adw->carriers[i].areq_ba = 0;
 1114         adw->carriers[i].next_ba = ~0;
 1115 
 1116         adw->init_level++;
 1117 
 1118         /* DMA tag for our acb structures */
 1119         if (bus_dma_tag_create(
 1120                         /* parent       */ adw->parent_dmat,
 1121                         /* alignment    */ 1,
 1122                         /* boundary     */ 0,
 1123                         /* lowaddr      */ BUS_SPACE_MAXADDR,
 1124                         /* highaddr     */ BUS_SPACE_MAXADDR,
 1125                         /* filter       */ NULL,
 1126                         /* filterarg    */ NULL,
 1127                         /* maxsize      */ adw->max_acbs * sizeof(struct acb),
 1128                         /* nsegments    */ 1,
 1129                         /* maxsegsz     */ BUS_SPACE_MAXSIZE_32BIT,
 1130                         /* flags        */ 0,
 1131                         /* lockfunc     */ busdma_lock_mutex,
 1132                         /* lockarg      */ &Giant,
 1133                         &adw->acb_dmat) != 0) {
 1134                 return (ENOMEM);
 1135         }
 1136 
 1137         adw->init_level++;
 1138 
 1139         /* Allocation for our ccbs */
 1140         if (bus_dmamem_alloc(adw->acb_dmat, (void **)&adw->acbs,
 1141                              BUS_DMA_NOWAIT, &adw->acb_dmamap) != 0)
 1142                 return (ENOMEM);
 1143 
 1144         adw->init_level++;
 1145 
 1146         /* And permanently map them */
 1147         bus_dmamap_load(adw->acb_dmat, adw->acb_dmamap,
 1148                         adw->acbs,
 1149                         adw->max_acbs * sizeof(struct acb),
 1150                         adwmapmem, &adw->acb_busbase, /*flags*/0);
 1151 
 1152         /* Clear them out. */
 1153         bzero(adw->acbs, adw->max_acbs * sizeof(struct acb)); 
 1154 
 1155         /* DMA tag for our S/G structures.  We allocate in page sized chunks */
 1156         if (bus_dma_tag_create(
 1157                         /* parent       */ adw->parent_dmat,
 1158                         /* alignment    */ 1,
 1159                         /* boundary     */ 0,
 1160                         /* lowaddr      */ BUS_SPACE_MAXADDR,
 1161                         /* highaddr     */ BUS_SPACE_MAXADDR,
 1162                         /* filter       */ NULL,
 1163                         /* filterarg    */ NULL,
 1164                         /* maxsize      */ PAGE_SIZE,
 1165                         /* nsegments    */ 1,
 1166                         /* maxsegsz     */ BUS_SPACE_MAXSIZE_32BIT,
 1167                         /* flags        */ 0,
 1168                         /* lockfunc     */ busdma_lock_mutex,
 1169                         /* lockarg      */ &Giant,
 1170                         &adw->sg_dmat) != 0) {
 1171                 return (ENOMEM);
 1172         }
 1173 
 1174         adw->init_level++;
 1175 
 1176         /* Allocate our first batch of ccbs */
 1177         if (adwallocacbs(adw) == 0)
 1178                 return (ENOMEM);
 1179 
 1180         if (adw_init_chip(adw, scsicfg1) != 0)
 1181                 return (ENXIO);
 1182 
 1183         printf("Queue Depth %d\n", adw->max_acbs);
 1184 
 1185         return (0);
 1186 }
 1187 
 1188 /*
 1189  * Attach all the sub-devices we can find
 1190  */
 1191 int
 1192 adw_attach(struct adw_softc *adw)
 1193 {
 1194         struct ccb_setasync csa;
 1195         struct cam_devq *devq;
 1196         int s;
 1197         int error;
 1198 
 1199         error = 0;
 1200         s = splcam();
 1201         /* Hook up our interrupt handler */
 1202         if ((error = bus_setup_intr(adw->device, adw->irq,
 1203                                     INTR_TYPE_CAM | INTR_ENTROPY, adw_intr,
 1204                                     adw, &adw->ih)) != 0) {
 1205                 device_printf(adw->device, "bus_setup_intr() failed: %d\n",
 1206                               error);
 1207                 goto fail;
 1208         }
 1209 
 1210         /* Start the Risc processor now that we are fully configured. */
 1211         adw_outw(adw, ADW_RISC_CSR, ADW_RISC_CSR_RUN);
 1212 
 1213         /*
 1214          * Create the device queue for our SIM.
 1215          */
 1216         devq = cam_simq_alloc(adw->max_acbs);
 1217         if (devq == NULL)
 1218                 return (ENOMEM);
 1219 
 1220         /*
 1221          * Construct our SIM entry.
 1222          */
 1223         adw->sim = cam_sim_alloc(adw_action, adw_poll, "adw", adw, adw->unit,
 1224                                  1, adw->max_acbs, devq);
 1225         if (adw->sim == NULL) {
 1226                 error = ENOMEM;
 1227                 goto fail;
 1228         }
 1229 
 1230         /*
 1231          * Register the bus.
 1232          */
 1233         if (xpt_bus_register(adw->sim, 0) != CAM_SUCCESS) {
 1234                 cam_sim_free(adw->sim, /*free devq*/TRUE);
 1235                 error = ENOMEM;
 1236                 goto fail;
 1237         }
 1238 
 1239         if (xpt_create_path(&adw->path, /*periph*/NULL, cam_sim_path(adw->sim),
 1240                             CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD)
 1241            == CAM_REQ_CMP) {
 1242                 xpt_setup_ccb(&csa.ccb_h, adw->path, /*priority*/5);
 1243                 csa.ccb_h.func_code = XPT_SASYNC_CB;
 1244                 csa.event_enable = AC_LOST_DEVICE;
 1245                 csa.callback = adw_async;
 1246                 csa.callback_arg = adw;
 1247                 xpt_action((union ccb *)&csa);
 1248         }
 1249 
 1250 fail:
 1251         splx(s);
 1252         return (error);
 1253 }
 1254 
 1255 void
 1256 adw_intr(void *arg)
 1257 {
 1258         struct  adw_softc *adw;
 1259         u_int   int_stat;
 1260         
 1261         adw = (struct adw_softc *)arg;
 1262         if ((adw_inw(adw, ADW_CTRL_REG) & ADW_CTRL_REG_HOST_INTR) == 0)
 1263                 return;
 1264 
 1265         /* Reading the register clears the interrupt. */
 1266         int_stat = adw_inb(adw, ADW_INTR_STATUS_REG);
 1267 
 1268         if ((int_stat & ADW_INTR_STATUS_INTRB) != 0) {
 1269                 u_int intrb_code;
 1270 
 1271                 /* Async Microcode Event */
 1272                 intrb_code = adw_lram_read_8(adw, ADW_MC_INTRB_CODE);
 1273                 switch (intrb_code) {
 1274                 case ADW_ASYNC_CARRIER_READY_FAILURE:
 1275                         /*
 1276                          * The RISC missed our update of
 1277                          * the commandq.
 1278                          */
 1279                         if (LIST_FIRST(&adw->pending_ccbs) != NULL)
 1280                                 adw_tickle_risc(adw, ADW_TICKLE_A);
 1281                         break;
 1282                 case ADW_ASYNC_SCSI_BUS_RESET_DET:
 1283                         /*
 1284                          * The firmware detected a SCSI Bus reset.
 1285                          */
 1286                         printf("Someone Reset the Bus\n");
 1287                         adw_handle_bus_reset(adw, /*initiated*/FALSE);
 1288                         break;
 1289                 case ADW_ASYNC_RDMA_FAILURE:
 1290                         /*
 1291                          * Handle RDMA failure by resetting the
 1292                          * SCSI Bus and chip.
 1293                          */
 1294 #if XXX
 1295                         AdvResetChipAndSB(adv_dvc_varp);
 1296 #endif
 1297                         break;
 1298 
 1299                 case ADW_ASYNC_HOST_SCSI_BUS_RESET:
 1300                         /*
 1301                          * Host generated SCSI bus reset occurred.
 1302                          */
 1303                         adw_handle_bus_reset(adw, /*initiated*/TRUE);
 1304                         break;
 1305                 default:
 1306                         printf("adw_intr: unknown async code 0x%x\n",
 1307                                intrb_code);
 1308                         break;
 1309                 }
 1310         }
 1311 
 1312         /*
 1313          * Run down the RequestQ.
 1314          */
 1315         while ((adw->responseq->next_ba & ADW_RQ_DONE) != 0) {
 1316                 struct adw_carrier *free_carrier;
 1317                 struct acb *acb;
 1318                 union ccb *ccb;
 1319 
 1320 #if 0
 1321                 printf("0x%x, 0x%x, 0x%x, 0x%x\n",
 1322                        adw->responseq->carr_offset,
 1323                        adw->responseq->carr_ba,
 1324                        adw->responseq->areq_ba,
 1325                        adw->responseq->next_ba);
 1326 #endif
 1327                 /*
 1328                  * The firmware copies the adw_scsi_req_q.acb_baddr
 1329                  * field into the areq_ba field of the carrier.
 1330                  */
 1331                 acb = acbbotov(adw, adw->responseq->areq_ba);
 1332 
 1333                 /*
 1334                  * The least significant four bits of the next_ba
 1335                  * field are used as flags.  Mask them out and then
 1336                  * advance through the list.
 1337                  */
 1338                 free_carrier = adw->responseq;
 1339                 adw->responseq =
 1340                     carrierbotov(adw, free_carrier->next_ba & ADW_NEXT_BA_MASK);
 1341                 free_carrier->next_ba = adw->free_carriers->carr_offset;
 1342                 adw->free_carriers = free_carrier;
 1343 
 1344                 /* Process CCB */
 1345                 ccb = acb->ccb;
 1346                 untimeout(adwtimeout, acb, ccb->ccb_h.timeout_ch);
 1347                 if ((ccb->ccb_h.flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
 1348                         bus_dmasync_op_t op;
 1349 
 1350                         if ((ccb->ccb_h.flags & CAM_DIR_MASK) == CAM_DIR_IN)
 1351                                 op = BUS_DMASYNC_POSTREAD;
 1352                         else
 1353                                 op = BUS_DMASYNC_POSTWRITE;
 1354                         bus_dmamap_sync(adw->buffer_dmat, acb->dmamap, op);
 1355                         bus_dmamap_unload(adw->buffer_dmat, acb->dmamap);
 1356                         ccb->csio.resid = acb->queue.data_cnt;
 1357                 } else 
 1358                         ccb->csio.resid = 0;
 1359 
 1360                 /* Common Cases inline... */
 1361                 if (acb->queue.host_status == QHSTA_NO_ERROR
 1362                  && (acb->queue.done_status == QD_NO_ERROR
 1363                   || acb->queue.done_status == QD_WITH_ERROR)) {
 1364                         ccb->csio.scsi_status = acb->queue.scsi_status;
 1365                         ccb->ccb_h.status = 0;
 1366                         switch (ccb->csio.scsi_status) {
 1367                         case SCSI_STATUS_OK:
 1368                                 ccb->ccb_h.status |= CAM_REQ_CMP;
 1369                                 break;
 1370                         case SCSI_STATUS_CHECK_COND:
 1371                         case SCSI_STATUS_CMD_TERMINATED:
 1372                                 bcopy(&acb->sense_data, &ccb->csio.sense_data,
 1373                                       ccb->csio.sense_len);
 1374                                 ccb->ccb_h.status |= CAM_AUTOSNS_VALID;
 1375                                 ccb->csio.sense_resid = acb->queue.sense_len;
 1376                                 /* FALLTHROUGH */
 1377                         default:
 1378                                 ccb->ccb_h.status |= CAM_SCSI_STATUS_ERROR
 1379                                                   |  CAM_DEV_QFRZN;
 1380                                 xpt_freeze_devq(ccb->ccb_h.path, /*count*/1);
 1381                                 break;
 1382                         }
 1383                         adwfreeacb(adw, acb);
 1384                         xpt_done(ccb);
 1385                 } else {
 1386                         adwprocesserror(adw, acb);
 1387                 }
 1388         }
 1389 }
 1390 
 1391 static void
 1392 adwprocesserror(struct adw_softc *adw, struct acb *acb)
 1393 {
 1394         union ccb *ccb;
 1395 
 1396         ccb = acb->ccb;
 1397         if (acb->queue.done_status == QD_ABORTED_BY_HOST) {
 1398                 ccb->ccb_h.status = CAM_REQ_ABORTED;
 1399         } else {
 1400 
 1401                 switch (acb->queue.host_status) {
 1402                 case QHSTA_M_SEL_TIMEOUT:
 1403                         ccb->ccb_h.status = CAM_SEL_TIMEOUT;
 1404                         break;
 1405                 case QHSTA_M_SXFR_OFF_UFLW:
 1406                 case QHSTA_M_SXFR_OFF_OFLW:
 1407                 case QHSTA_M_DATA_OVER_RUN:
 1408                         ccb->ccb_h.status = CAM_DATA_RUN_ERR;
 1409                         break;
 1410                 case QHSTA_M_SXFR_DESELECTED:
 1411                 case QHSTA_M_UNEXPECTED_BUS_FREE:
 1412                         ccb->ccb_h.status = CAM_UNEXP_BUSFREE;
 1413                         break;
 1414                 case QHSTA_M_SCSI_BUS_RESET:
 1415                 case QHSTA_M_SCSI_BUS_RESET_UNSOL:
 1416                         ccb->ccb_h.status = CAM_SCSI_BUS_RESET;
 1417                         break;
 1418                 case QHSTA_M_BUS_DEVICE_RESET:
 1419                         ccb->ccb_h.status = CAM_BDR_SENT;
 1420                         break;
 1421                 case QHSTA_M_QUEUE_ABORTED:
 1422                         /* BDR or Bus Reset */
 1423                         printf("Saw Queue Aborted\n");
 1424                         ccb->ccb_h.status = adw->last_reset;
 1425                         break;
 1426                 case QHSTA_M_SXFR_SDMA_ERR:
 1427                 case QHSTA_M_SXFR_SXFR_PERR:
 1428                 case QHSTA_M_RDMA_PERR:
 1429                         ccb->ccb_h.status = CAM_UNCOR_PARITY;
 1430                         break;
 1431                 case QHSTA_M_WTM_TIMEOUT:
 1432                 case QHSTA_M_SXFR_WD_TMO:
 1433                 {
 1434                         /* The SCSI bus hung in a phase */
 1435                         xpt_print_path(adw->path);
 1436                         printf("Watch Dog timer expired.  Reseting bus\n");
 1437                         adw_reset_bus(adw);
 1438                         break;
 1439                 }
 1440                 case QHSTA_M_SXFR_XFR_PH_ERR:
 1441                         ccb->ccb_h.status = CAM_SEQUENCE_FAIL;
 1442                         break;
 1443                 case QHSTA_M_SXFR_UNKNOWN_ERROR:
 1444                         break;
 1445                 case QHSTA_M_BAD_CMPL_STATUS_IN:
 1446                         /* No command complete after a status message */
 1447                         ccb->ccb_h.status = CAM_SEQUENCE_FAIL;
 1448                         break;
 1449                 case QHSTA_M_AUTO_REQ_SENSE_FAIL:
 1450                         ccb->ccb_h.status = CAM_AUTOSENSE_FAIL;
 1451                         break;
 1452                 case QHSTA_M_INVALID_DEVICE:
 1453                         ccb->ccb_h.status = CAM_PATH_INVALID;
 1454                         break;
 1455                 case QHSTA_M_NO_AUTO_REQ_SENSE:
 1456                         /*
 1457                          * User didn't request sense, but we got a
 1458                          * check condition.
 1459                          */
 1460                         ccb->csio.scsi_status = acb->queue.scsi_status;
 1461                         ccb->ccb_h.status = CAM_SCSI_STATUS_ERROR;
 1462                         break;
 1463                 default:
 1464                         panic("%s: Unhandled Host status error %x",
 1465                               adw_name(adw), acb->queue.host_status);
 1466                         /* NOTREACHED */
 1467                 }
 1468         }
 1469         if ((acb->state & ACB_RECOVERY_ACB) != 0) {
 1470                 if (ccb->ccb_h.status == CAM_SCSI_BUS_RESET
 1471                  || ccb->ccb_h.status == CAM_BDR_SENT)
 1472                         ccb->ccb_h.status = CAM_CMD_TIMEOUT;
 1473         }
 1474         if (ccb->ccb_h.status != CAM_REQ_CMP) {
 1475                 xpt_freeze_devq(ccb->ccb_h.path, /*count*/1);
 1476                 ccb->ccb_h.status |= CAM_DEV_QFRZN;
 1477         }
 1478         adwfreeacb(adw, acb);
 1479         xpt_done(ccb);
 1480 }
 1481 
 1482 static void
 1483 adwtimeout(void *arg)
 1484 {
 1485         struct acb           *acb;
 1486         union  ccb           *ccb;
 1487         struct adw_softc     *adw;
 1488         adw_idle_cmd_status_t status;
 1489         int                   target_id;
 1490         int                   s;
 1491 
 1492         acb = (struct acb *)arg;
 1493         ccb = acb->ccb;
 1494         adw = (struct adw_softc *)ccb->ccb_h.ccb_adw_ptr;
 1495         xpt_print_path(ccb->ccb_h.path);
 1496         printf("ACB %p - timed out\n", (void *)acb);
 1497 
 1498         s = splcam();
 1499 
 1500         if ((acb->state & ACB_ACTIVE) == 0) {
 1501                 xpt_print_path(ccb->ccb_h.path);
 1502                 printf("ACB %p - timed out CCB already completed\n",
 1503                        (void *)acb);
 1504                 splx(s);
 1505                 return;
 1506         }
 1507 
 1508         acb->state |= ACB_RECOVERY_ACB;
 1509         target_id = ccb->ccb_h.target_id;
 1510 
 1511         /* Attempt a BDR first */
 1512         status = adw_idle_cmd_send(adw, ADW_IDLE_CMD_DEVICE_RESET,
 1513                                    ccb->ccb_h.target_id);
 1514         splx(s);
 1515         if (status == ADW_IDLE_CMD_SUCCESS) {
 1516                 printf("%s: BDR Delivered.  No longer in timeout\n",
 1517                        adw_name(adw));
 1518                 adw_handle_device_reset(adw, target_id);
 1519         } else {
 1520                 adw_reset_bus(adw);
 1521                 xpt_print_path(adw->path);
 1522                 printf("Bus Reset Delivered.  No longer in timeout\n");
 1523         }
 1524 }
 1525 
 1526 static void
 1527 adw_handle_device_reset(struct adw_softc *adw, u_int target)
 1528 {
 1529         struct cam_path *path;
 1530         cam_status error;
 1531 
 1532         error = xpt_create_path(&path, /*periph*/NULL, cam_sim_path(adw->sim),
 1533                                 target, CAM_LUN_WILDCARD);
 1534 
 1535         if (error == CAM_REQ_CMP) {
 1536                 xpt_async(AC_SENT_BDR, path, NULL);
 1537                 xpt_free_path(path);
 1538         }
 1539         adw->last_reset = CAM_BDR_SENT;
 1540 }
 1541 
 1542 static void
 1543 adw_handle_bus_reset(struct adw_softc *adw, int initiated)
 1544 {
 1545         if (initiated) {
 1546                 /*
 1547                  * The microcode currently sets the SCSI Bus Reset signal
 1548                  * while handling the AscSendIdleCmd() IDLE_CMD_SCSI_RESET
 1549                  * command above.  But the SCSI Bus Reset Hold Time in the
 1550                  * microcode is not deterministic (it may in fact be for less
 1551                  * than the SCSI Spec. minimum of 25 us).  Therefore on return
 1552                  * the Adv Library sets the SCSI Bus Reset signal for
 1553                  * ADW_SCSI_RESET_HOLD_TIME_US, which is defined to be greater
 1554                  * than 25 us.
 1555                  */
 1556                 u_int scsi_ctrl;
 1557 
 1558                 scsi_ctrl = adw_inw(adw, ADW_SCSI_CTRL) & ~ADW_SCSI_CTRL_RSTOUT;
 1559                 adw_outw(adw, ADW_SCSI_CTRL, scsi_ctrl | ADW_SCSI_CTRL_RSTOUT);
 1560                 DELAY(ADW_SCSI_RESET_HOLD_TIME_US);
 1561                 adw_outw(adw, ADW_SCSI_CTRL, scsi_ctrl);
 1562 
 1563                 /*
 1564                  * We will perform the async notification when the
 1565                  * SCSI Reset interrupt occurs.
 1566                  */
 1567         } else
 1568                 xpt_async(AC_BUS_RESET, adw->path, NULL);
 1569         adw->last_reset = CAM_SCSI_BUS_RESET;
 1570 }
 1571 MODULE_DEPEND(adw, cam, 1, 1, 1);
 1572 

Cache object: 60c35abec4f8d50ee1ce1ffd5e8d8591


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