The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/dev/twa/tw_osl_cam.c

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    1 /*
    2  * Copyright (c) 2004-07 Applied Micro Circuits Corporation.
    3  * Copyright (c) 2004-05 Vinod Kashyap.
    4  * All rights reserved.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   25  * SUCH DAMAGE.
   26  *
   27  *      $FreeBSD: releng/10.4/sys/dev/twa/tw_osl_cam.c 315813 2017-03-23 06:41:13Z mav $
   28  */
   29 
   30 /*
   31  * AMCC'S 3ware driver for 9000 series storage controllers.
   32  *
   33  * Author: Vinod Kashyap
   34  * Modifications by: Adam Radford
   35  * Modifications by: Manjunath Ranganathaiah
   36  */
   37 
   38 
   39 /*
   40  * FreeBSD CAM related functions.
   41  */
   42 
   43 
   44 #include <dev/twa/tw_osl_includes.h>
   45 
   46 #include <cam/cam.h>
   47 #include <cam/cam_ccb.h>
   48 #include <cam/cam_sim.h>
   49 #include <cam/cam_xpt_sim.h>
   50 #include <cam/cam_debug.h>
   51 #include <cam/cam_periph.h>
   52 
   53 #include <cam/scsi/scsi_all.h>
   54 #include <cam/scsi/scsi_message.h>
   55 
   56 static TW_VOID  twa_action(struct cam_sim *sim, union ccb *ccb);
   57 static TW_VOID  twa_poll(struct cam_sim *sim);
   58 
   59 static TW_INT32 tw_osli_execute_scsi(struct tw_osli_req_context *req,
   60         union ccb *ccb);
   61 
   62 
   63 
   64 /*
   65  * Function name:       tw_osli_cam_attach
   66  * Description:         Attaches the driver to CAM.
   67  *
   68  * Input:               sc      -- ptr to OSL internal ctlr context
   69  * Output:              None
   70  * Return value:        0       -- success
   71  *                      non-zero-- failure
   72  */
   73 TW_INT32
   74 tw_osli_cam_attach(struct twa_softc *sc)
   75 {
   76         struct cam_devq         *devq;
   77 
   78         tw_osli_dbg_dprintf(3, sc, "entered");
   79 
   80         /*
   81          * Create the device queue for our SIM.
   82          */
   83         if ((devq = cam_simq_alloc(TW_OSLI_MAX_NUM_IOS)) == NULL) {
   84                 tw_osli_printf(sc, "error = %d",
   85                         TW_CL_SEVERITY_ERROR_STRING,
   86                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
   87                         0x2100,
   88                         "Failed to create SIM device queue",
   89                         ENOMEM);
   90                 return(ENOMEM);
   91         }
   92 
   93         /*
   94          * Create a SIM entry.  Though we can support TW_OSLI_MAX_NUM_REQUESTS
   95          * simultaneous requests, we claim to be able to handle only
   96          * TW_OSLI_MAX_NUM_IOS (two less), so that we always have a request
   97          * packet available to service ioctls and AENs.
   98          */
   99         tw_osli_dbg_dprintf(3, sc, "Calling cam_sim_alloc");
  100         sc->sim = cam_sim_alloc(twa_action, twa_poll, "twa", sc,
  101                         device_get_unit(sc->bus_dev), sc->sim_lock,
  102                         TW_OSLI_MAX_NUM_IOS, 1, devq);
  103         if (sc->sim == NULL) {
  104                 cam_simq_free(devq);
  105                 tw_osli_printf(sc, "error = %d",
  106                         TW_CL_SEVERITY_ERROR_STRING,
  107                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
  108                         0x2101,
  109                         "Failed to create a SIM entry",
  110                         ENOMEM);
  111                 return(ENOMEM);
  112         }
  113 
  114         /*
  115          * Register the bus.
  116          */
  117         tw_osli_dbg_dprintf(3, sc, "Calling xpt_bus_register");
  118         mtx_lock(sc->sim_lock);
  119         if (xpt_bus_register(sc->sim, sc->bus_dev, 0) != CAM_SUCCESS) {
  120                 cam_sim_free(sc->sim, TRUE);
  121                 sc->sim = NULL; /* so cam_detach will not try to free it */
  122                 tw_osli_printf(sc, "error = %d",
  123                         TW_CL_SEVERITY_ERROR_STRING,
  124                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
  125                         0x2102,
  126                         "Failed to register the bus",
  127                         ENXIO);
  128                 mtx_unlock(sc->sim_lock);
  129                 return(ENXIO);
  130         }
  131 
  132         tw_osli_dbg_dprintf(3, sc, "Calling xpt_create_path");
  133         if (xpt_create_path(&sc->path, NULL,
  134                                 cam_sim_path(sc->sim),
  135                                 CAM_TARGET_WILDCARD,
  136                                 CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
  137                 xpt_bus_deregister(cam_sim_path (sc->sim));
  138                 /* Passing TRUE to cam_sim_free will free the devq as well. */
  139                 cam_sim_free(sc->sim, TRUE);
  140                 tw_osli_printf(sc, "error = %d",
  141                         TW_CL_SEVERITY_ERROR_STRING,
  142                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
  143                         0x2103,
  144                         "Failed to create path",
  145                         ENXIO);
  146                 mtx_unlock(sc->sim_lock);
  147                 return(ENXIO);
  148         }
  149         mtx_unlock(sc->sim_lock);
  150 
  151         tw_osli_dbg_dprintf(3, sc, "exiting");
  152         return(0);
  153 }
  154 
  155 
  156 
  157 /*
  158  * Function name:       tw_osli_cam_detach
  159  * Description:         Detaches the driver from CAM.
  160  *
  161  * Input:               sc      -- ptr to OSL internal ctlr context
  162  * Output:              None
  163  * Return value:        None
  164  */
  165 TW_VOID
  166 tw_osli_cam_detach(struct twa_softc *sc)
  167 {
  168         tw_osli_dbg_dprintf(3, sc, "entered");
  169 
  170         mtx_lock(sc->sim_lock);
  171            
  172         if (sc->path)
  173                 xpt_free_path(sc->path);
  174         if (sc->sim) {
  175                 xpt_bus_deregister(cam_sim_path(sc->sim));
  176                 /* Passing TRUE to cam_sim_free will free the devq as well. */
  177                 cam_sim_free(sc->sim, TRUE);
  178         }
  179         /* It's ok have 1 hold count while destroying the mutex */
  180         mtx_destroy(sc->sim_lock);
  181 }
  182 
  183 
  184 
  185 /*
  186  * Function name:       tw_osli_execute_scsi
  187  * Description:         Build a fw cmd, based on a CAM style ccb, and
  188  *                      send it down.
  189  *
  190  * Input:               req     -- ptr to OSL internal request context
  191  *                      ccb     -- ptr to CAM style ccb
  192  * Output:              None
  193  * Return value:        0       -- success
  194  *                      non-zero-- failure
  195  */
  196 TW_INT32
  197 tw_osli_execute_scsi(struct tw_osli_req_context *req, union ccb *ccb)
  198 {
  199         struct twa_softc                *sc = req->ctlr;
  200         struct tw_cl_req_packet         *req_pkt;
  201         struct tw_cl_scsi_req_packet    *scsi_req;
  202         struct ccb_hdr                  *ccb_h = &(ccb->ccb_h);
  203         struct ccb_scsiio               *csio = &(ccb->csio);
  204         TW_INT32                        error;
  205 
  206         tw_osli_dbg_dprintf(10, sc, "SCSI I/O request 0x%x",
  207                 csio->cdb_io.cdb_bytes[0]);
  208 
  209         if (ccb_h->target_id >= TW_CL_MAX_NUM_UNITS) {
  210                 tw_osli_dbg_dprintf(3, sc, "Invalid target. PTL = %x %x %x",
  211                         ccb_h->path_id, ccb_h->target_id, ccb_h->target_lun);
  212                 ccb_h->status |= CAM_TID_INVALID;
  213                 xpt_done(ccb);
  214                 return(1);
  215         }
  216         if (ccb_h->target_lun >= TW_CL_MAX_NUM_LUNS) {
  217                 tw_osli_dbg_dprintf(3, sc, "Invalid lun. PTL = %x %x %x",
  218                         ccb_h->path_id, ccb_h->target_id, ccb_h->target_lun);
  219                 ccb_h->status |= CAM_LUN_INVALID;
  220                 xpt_done(ccb);
  221                 return(1);
  222         }
  223 
  224         if(ccb_h->flags & CAM_CDB_PHYS) {
  225                 tw_osli_printf(sc, "",
  226                         TW_CL_SEVERITY_ERROR_STRING,
  227                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
  228                         0x2105,
  229                         "Physical CDB address!");
  230                 ccb_h->status = CAM_REQ_INVALID;
  231                 xpt_done(ccb);
  232                 return(1);
  233         }
  234 
  235         /*
  236          * We are going to work on this request.  Mark it as enqueued (though
  237          * we don't actually queue it...)
  238          */
  239         ccb_h->status |= CAM_SIM_QUEUED;
  240 
  241         if((ccb_h->flags & CAM_DIR_MASK) != CAM_DIR_NONE) {
  242                 if(ccb_h->flags & CAM_DIR_IN)
  243                         req->flags |= TW_OSLI_REQ_FLAGS_DATA_IN;
  244                 else
  245                         req->flags |= TW_OSLI_REQ_FLAGS_DATA_OUT;
  246         }
  247 
  248         /* Build the CL understood request packet for SCSI cmds. */
  249         req_pkt = &req->req_pkt;
  250         req_pkt->status = 0;
  251         req_pkt->tw_osl_callback = tw_osl_complete_io;
  252         scsi_req = &(req_pkt->gen_req_pkt.scsi_req);
  253         scsi_req->unit = ccb_h->target_id;
  254         scsi_req->lun = ccb_h->target_lun;
  255         scsi_req->sense_len = 0;
  256         scsi_req->sense_data = (TW_UINT8 *)(&csio->sense_data);
  257         scsi_req->scsi_status = 0;
  258         if(ccb_h->flags & CAM_CDB_POINTER)
  259                 scsi_req->cdb = csio->cdb_io.cdb_ptr;
  260         else
  261                 scsi_req->cdb = csio->cdb_io.cdb_bytes;
  262         scsi_req->cdb_len = csio->cdb_len;
  263 
  264         if (csio->dxfer_len > TW_CL_MAX_IO_SIZE) {
  265                 tw_osli_printf(sc, "size = %d",
  266                         TW_CL_SEVERITY_ERROR_STRING,
  267                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
  268                         0x2106,
  269                         "I/O size too big",
  270                         csio->dxfer_len);
  271                 ccb_h->status = CAM_REQ_TOO_BIG;
  272                 ccb_h->status &= ~CAM_SIM_QUEUED;
  273                 xpt_done(ccb);
  274                 return(1);
  275         }
  276         if ((ccb_h->flags & CAM_DATA_MASK) == CAM_DATA_VADDR) {
  277                 if ((req->length = csio->dxfer_len) != 0) {
  278                         req->data = csio->data_ptr;
  279                         scsi_req->sgl_entries = 1;
  280                 }
  281         } else
  282                 req->flags |= TW_OSLI_REQ_FLAGS_CCB;
  283         req->deadline = tw_osl_get_local_time() + (ccb_h->timeout / 1000);
  284 
  285         /*
  286          * twa_map_load_data_callback will fill in the SGL,
  287          * and submit the I/O.
  288          */
  289         error = tw_osli_map_request(req);
  290         if ((error) && (req->flags & TW_OSLI_REQ_FLAGS_FAILED)) {
  291                 req->deadline = 0;
  292                 ccb_h->status = CAM_REQ_CMP_ERR;
  293                 ccb_h->status &= ~CAM_SIM_QUEUED;
  294                 xpt_done(ccb);
  295         }
  296         return(error);
  297 }
  298 
  299 
  300 
  301 /*
  302  * Function name:       twa_action
  303  * Description:         Driver entry point for CAM's use.
  304  *
  305  * Input:               sim     -- sim corresponding to the ctlr
  306  *                      ccb     -- ptr to CAM request
  307  * Output:              None
  308  * Return value:        None
  309  */
  310 TW_VOID
  311 twa_action(struct cam_sim *sim, union ccb *ccb)
  312 {
  313         struct twa_softc        *sc = (struct twa_softc *)cam_sim_softc(sim);
  314         struct ccb_hdr          *ccb_h = &(ccb->ccb_h);
  315 
  316         switch (ccb_h->func_code) {
  317         case XPT_SCSI_IO:       /* SCSI I/O */
  318         {
  319                 struct tw_osli_req_context      *req;
  320 
  321                 req = tw_osli_get_request(sc);
  322                 if (req == NULL) {
  323                         tw_osli_dbg_dprintf(2, sc, "Cannot get request pkt.");
  324                         /*
  325                          * Freeze the simq to maintain ccb ordering.  The next
  326                          * ccb that gets completed will unfreeze the simq.
  327                          */
  328                         ccb_h->status &= ~CAM_SIM_QUEUED;
  329                         ccb_h->status |= CAM_REQUEUE_REQ;
  330                         xpt_done(ccb);
  331                         break;
  332                 }
  333 
  334                 if ((tw_cl_is_reset_needed(&(req->ctlr->ctlr_handle)))) {
  335                         ccb_h->status &= ~CAM_SIM_QUEUED;
  336                         ccb_h->status |= CAM_REQUEUE_REQ;
  337                         xpt_done(ccb);
  338                         tw_osli_req_q_insert_tail(req, TW_OSLI_FREE_Q);
  339                         break;
  340                 }
  341 
  342                 req->req_handle.osl_req_ctxt = req;
  343                 req->req_handle.is_io = TW_CL_TRUE;
  344                 req->orig_req = ccb;
  345                 if (tw_osli_execute_scsi(req, ccb))
  346                         tw_osli_req_q_insert_tail(req, TW_OSLI_FREE_Q);
  347                 break;
  348         }
  349 
  350         case XPT_ABORT:
  351                 tw_osli_dbg_dprintf(2, sc, "Abort request.");
  352                 ccb_h->status = CAM_UA_ABORT;
  353                 xpt_done(ccb);
  354                 break;
  355 
  356         case XPT_RESET_BUS:
  357                 tw_cl_create_event(&(sc->ctlr_handle), TW_CL_FALSE,
  358                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
  359                         0x2108, 0x3, TW_CL_SEVERITY_INFO_STRING,
  360                         "Received Reset Bus request from CAM",
  361                         " ");
  362 
  363                 tw_cl_set_reset_needed(&(sc->ctlr_handle));
  364                 ccb_h->status = CAM_REQ_CMP;
  365                 xpt_done(ccb);
  366                 break;
  367 
  368         case XPT_SET_TRAN_SETTINGS:
  369                 tw_osli_dbg_dprintf(3, sc, "XPT_SET_TRAN_SETTINGS");
  370 
  371                 /*
  372                  * This command is not supported, since it's very specific
  373                  * to SCSI, and we are doing ATA.
  374                  */
  375                 ccb_h->status = CAM_FUNC_NOTAVAIL;
  376                 xpt_done(ccb);
  377                 break;
  378 
  379         case XPT_GET_TRAN_SETTINGS: 
  380         {
  381                 struct ccb_trans_settings       *cts = &ccb->cts;
  382                 struct ccb_trans_settings_scsi *scsi =
  383                     &cts->proto_specific.scsi;
  384                 struct ccb_trans_settings_spi *spi =
  385                     &cts->xport_specific.spi;
  386 
  387                 cts->protocol = PROTO_SCSI;
  388                 cts->protocol_version = SCSI_REV_2;
  389                 cts->transport = XPORT_SPI;
  390                 cts->transport_version = 2;
  391 
  392                 spi->valid = CTS_SPI_VALID_DISC;
  393                 spi->flags = CTS_SPI_FLAGS_DISC_ENB;
  394                 scsi->valid = CTS_SCSI_VALID_TQ;
  395                 scsi->flags = CTS_SCSI_FLAGS_TAG_ENB;
  396                 tw_osli_dbg_dprintf(3, sc, "XPT_GET_TRAN_SETTINGS");
  397                 ccb_h->status = CAM_REQ_CMP;
  398                 xpt_done(ccb);
  399                 break;
  400         }
  401 
  402         case XPT_CALC_GEOMETRY:
  403                 tw_osli_dbg_dprintf(3, sc, "XPT_CALC_GEOMETRY");
  404                 cam_calc_geometry(&ccb->ccg, 1/* extended */);
  405                 xpt_done(ccb);
  406                 break;
  407 
  408         case XPT_PATH_INQ:    /* Path inquiry -- get twa properties */
  409         {
  410                 struct ccb_pathinq      *path_inq = &ccb->cpi;
  411 
  412                 tw_osli_dbg_dprintf(3, sc, "XPT_PATH_INQ request");
  413 
  414                 path_inq->version_num = 1;
  415                 path_inq->hba_inquiry = 0;
  416                 path_inq->target_sprt = 0;
  417                 path_inq->hba_misc = 0;
  418                 path_inq->hba_eng_cnt = 0;
  419                 path_inq->max_target = TW_CL_MAX_NUM_UNITS;
  420                 path_inq->max_lun = TW_CL_MAX_NUM_LUNS - 1;
  421                 path_inq->unit_number = cam_sim_unit(sim);
  422                 path_inq->bus_id = cam_sim_bus(sim);
  423                 path_inq->initiator_id = TW_CL_MAX_NUM_UNITS;
  424                 path_inq->base_transfer_speed = 100000;
  425                 strlcpy(path_inq->sim_vid, "FreeBSD", SIM_IDLEN);
  426                 strlcpy(path_inq->hba_vid, "3ware", HBA_IDLEN);
  427                 strlcpy(path_inq->dev_name, cam_sim_name(sim), DEV_IDLEN);
  428                 path_inq->transport = XPORT_SPI;
  429                 path_inq->transport_version = 2;
  430                 path_inq->protocol = PROTO_SCSI;
  431                 path_inq->protocol_version = SCSI_REV_2;
  432                 path_inq->maxio = TW_CL_MAX_IO_SIZE;
  433                 ccb_h->status = CAM_REQ_CMP;
  434                 xpt_done(ccb);
  435                 break;
  436         }
  437 
  438         default:
  439                 tw_osli_dbg_dprintf(3, sc, "func_code = %x", ccb_h->func_code);
  440                 ccb_h->status = CAM_REQ_INVALID;
  441                 xpt_done(ccb);
  442                 break;
  443         }
  444 }
  445 
  446 
  447 
  448 /*
  449  * Function name:       twa_poll
  450  * Description:         Driver entry point called when interrupts are not
  451  *                      available.
  452  *
  453  * Input:               sim     -- sim corresponding to the controller
  454  * Output:              None
  455  * Return value:        None
  456  */
  457 TW_VOID
  458 twa_poll(struct cam_sim *sim)
  459 {
  460         struct twa_softc *sc = (struct twa_softc *)(cam_sim_softc(sim));
  461 
  462         tw_osli_dbg_dprintf(3, sc, "entering; sc = %p", sc);
  463         tw_cl_interrupt(&(sc->ctlr_handle));
  464         tw_osli_dbg_dprintf(3, sc, "exiting; sc = %p", sc);
  465 }
  466 
  467 
  468 
  469 /*
  470  * Function name:       tw_osli_request_bus_scan
  471  * Description:         Requests CAM for a scan of the bus.
  472  *
  473  * Input:               sc      -- ptr to per ctlr structure
  474  * Output:              None
  475  * Return value:        0       -- success
  476  *                      non-zero-- failure
  477  */
  478 TW_INT32
  479 tw_osli_request_bus_scan(struct twa_softc *sc)
  480 {
  481         union ccb       *ccb;
  482 
  483         tw_osli_dbg_dprintf(3, sc, "entering");
  484 
  485         /* If we get here before sc->sim is initialized, return an error. */
  486         if (!(sc->sim))
  487                 return(ENXIO);
  488         if ((ccb = xpt_alloc_ccb()) == NULL)
  489                 return(ENOMEM);
  490         mtx_lock(sc->sim_lock);
  491         if (xpt_create_path(&ccb->ccb_h.path, NULL, cam_sim_path(sc->sim),
  492             CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD) != CAM_REQ_CMP) {
  493                 xpt_free_ccb(ccb);
  494                 mtx_unlock(sc->sim_lock);
  495                 return(EIO);
  496         }
  497 
  498         xpt_rescan(ccb);
  499         mtx_unlock(sc->sim_lock);
  500         return(0);
  501 }
  502 
  503 
  504 
  505 /*
  506  * Function name:       tw_osli_disallow_new_requests
  507  * Description:         Calls the appropriate CAM function, so as to freeze
  508  *                      the flow of new requests from CAM to this controller.
  509  *
  510  * Input:               sc      -- ptr to OSL internal ctlr context
  511  *                      req_handle -- ptr to request handle sent by OSL.
  512  * Output:              None
  513  * Return value:        None
  514  */
  515 TW_VOID
  516 tw_osli_disallow_new_requests(struct twa_softc *sc,
  517         struct tw_cl_req_handle *req_handle)
  518 {
  519         /* Only freeze/release the simq for IOs */
  520         if (req_handle->is_io) {
  521                 struct tw_osli_req_context      *req = req_handle->osl_req_ctxt;
  522                 union ccb                       *ccb = (union ccb *)(req->orig_req);
  523 
  524                 xpt_freeze_simq(sc->sim, 1);
  525                 ccb->ccb_h.status |= CAM_RELEASE_SIMQ;
  526         }
  527 }
  528 
  529 
  530 
  531 /*
  532  * Function name:       tw_osl_timeout
  533  * Description:         Call to timeout().
  534  *
  535  * Input:               req_handle -- ptr to request handle sent by OSL.
  536  * Output:              None
  537  * Return value:        None
  538  */
  539 TW_VOID
  540 tw_osl_timeout(struct tw_cl_req_handle *req_handle)
  541 {
  542         struct tw_osli_req_context      *req = req_handle->osl_req_ctxt;
  543         union ccb                       *ccb = (union ccb *)(req->orig_req);
  544         struct ccb_hdr                  *ccb_h = &(ccb->ccb_h);
  545 
  546         req->deadline = tw_osl_get_local_time() + (ccb_h->timeout / 1000);
  547 }
  548 
  549 
  550 
  551 /*
  552  * Function name:       tw_osl_untimeout
  553  * Description:         Inverse of call to timeout().
  554  *
  555  * Input:               req_handle -- ptr to request handle sent by OSL.
  556  * Output:              None
  557  * Return value:        None
  558  */
  559 TW_VOID
  560 tw_osl_untimeout(struct tw_cl_req_handle *req_handle)
  561 {
  562         struct tw_osli_req_context      *req = req_handle->osl_req_ctxt;
  563 
  564         req->deadline = 0;
  565 }
  566 
  567 
  568 
  569 /*
  570  * Function name:       tw_osl_scan_bus
  571  * Description:         CL calls this function to request for a bus scan.
  572  *
  573  * Input:               ctlr_handle     -- ptr to controller handle
  574  * Output:              None
  575  * Return value:        None
  576  */
  577 TW_VOID
  578 tw_osl_scan_bus(struct tw_cl_ctlr_handle *ctlr_handle)
  579 {
  580         struct twa_softc        *sc = ctlr_handle->osl_ctlr_ctxt;
  581         TW_INT32                error;
  582 
  583         if ((error = tw_osli_request_bus_scan(sc)))
  584                 tw_osli_printf(sc, "error = %d",
  585                         TW_CL_SEVERITY_ERROR_STRING,
  586                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
  587                         0x2109,
  588                         "Bus scan request to CAM failed",
  589                         error);
  590 }
  591 
  592 
  593 
  594 /*
  595  * Function name:       tw_osl_complete_io
  596  * Description:         Called to complete CAM scsi requests.
  597  *
  598  * Input:               req_handle      -- ptr to request handle
  599  * Output:              None
  600  * Return value:        None
  601  */
  602 TW_VOID
  603 tw_osl_complete_io(struct tw_cl_req_handle *req_handle)
  604 {
  605         struct tw_osli_req_context      *req = req_handle->osl_req_ctxt;
  606         struct tw_cl_req_packet         *req_pkt =
  607                 (struct tw_cl_req_packet *)(&req->req_pkt);
  608         struct tw_cl_scsi_req_packet    *scsi_req;
  609         struct twa_softc                *sc = req->ctlr;
  610         union ccb                       *ccb = (union ccb *)(req->orig_req);
  611 
  612         tw_osli_dbg_dprintf(10, sc, "entering");
  613 
  614         if (req->state != TW_OSLI_REQ_STATE_BUSY)
  615                 tw_osli_printf(sc, "request = %p, status = %d",
  616                         TW_CL_SEVERITY_ERROR_STRING,
  617                         TW_CL_MESSAGE_SOURCE_FREEBSD_DRIVER,
  618                         0x210A,
  619                         "Unposted command completed!!",
  620                         req, req->state);
  621 
  622         /*
  623          * Remove request from the busy queue.  Just mark it complete.
  624          * There's no need to move it into the complete queue as we are
  625          * going to be done with it right now.
  626          */
  627         req->state = TW_OSLI_REQ_STATE_COMPLETE;
  628         tw_osli_req_q_remove_item(req, TW_OSLI_BUSY_Q);
  629 
  630         tw_osli_unmap_request(req);
  631 
  632         req->deadline = 0;
  633         if (req->error_code) {
  634                 /* This request never got submitted to the firmware. */
  635                 if (req->error_code == EBUSY) {
  636                         /*
  637                          * Cmd queue is full, or the Common Layer is out of
  638                          * resources.  The simq will already have been frozen.
  639                          * When this ccb gets completed will unfreeze the simq.
  640                          */
  641                         ccb->ccb_h.status |= CAM_REQUEUE_REQ;
  642                 }
  643                 else if (req->error_code == EFBIG)
  644                         ccb->ccb_h.status = CAM_REQ_TOO_BIG;
  645                 else
  646                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
  647         } else {
  648                 scsi_req = &(req_pkt->gen_req_pkt.scsi_req);
  649                 if (req_pkt->status == TW_CL_ERR_REQ_SUCCESS)
  650                         ccb->ccb_h.status = CAM_REQ_CMP;
  651                 else {
  652                         if (req_pkt->status & TW_CL_ERR_REQ_INVALID_TARGET)
  653                                 ccb->ccb_h.status |= CAM_SEL_TIMEOUT;
  654                         else if (req_pkt->status & TW_CL_ERR_REQ_INVALID_LUN)
  655                                 ccb->ccb_h.status |= CAM_DEV_NOT_THERE;
  656                         else if (req_pkt->status & TW_CL_ERR_REQ_SCSI_ERROR)
  657                                 ccb->ccb_h.status |= CAM_SCSI_STATUS_ERROR;
  658                         else if (req_pkt->status & TW_CL_ERR_REQ_BUS_RESET)
  659                                 ccb->ccb_h.status |= (CAM_REQUEUE_REQ | CAM_SCSI_BUS_RESET);
  660                         /*
  661                          * If none of the above errors occurred, simply
  662                          * mark completion error.
  663                          */
  664                         if (ccb->ccb_h.status == 0)
  665                                 ccb->ccb_h.status = CAM_REQ_CMP_ERR;
  666 
  667                         if (req_pkt->status & TW_CL_ERR_REQ_AUTO_SENSE_VALID) {
  668                                 ccb->csio.sense_len = scsi_req->sense_len;
  669                                 ccb->ccb_h.status |= CAM_AUTOSNS_VALID;
  670                         }
  671                 }
  672 
  673                 ccb->csio.scsi_status = scsi_req->scsi_status;
  674         }
  675 
  676         ccb->ccb_h.status &= ~CAM_SIM_QUEUED;
  677         mtx_lock(sc->sim_lock);
  678         xpt_done(ccb);
  679         mtx_unlock(sc->sim_lock);
  680         if (! req->error_code)
  681                  /* twa_action will free the request otherwise */
  682                 tw_osli_req_q_insert_tail(req, TW_OSLI_FREE_Q);
  683 }
  684 

Cache object: d0219e253384082e2a2d90dec847518e


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