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

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    1 /*-
    2  * Copyright (c) 1997, 1998, 1999 Nicolas Souchu
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  *
   26  */
   27 
   28 #include <sys/cdefs.h>
   29 __FBSDID("$FreeBSD: releng/5.4/sys/dev/ppbus/vpo.c 131882 2004-07-09 16:56:46Z cognet $");
   30 
   31 #include <sys/param.h>
   32 #include <sys/systm.h>
   33 #include <sys/module.h>
   34 #include <sys/bus.h>
   35 #include <sys/malloc.h>
   36 
   37 #include <cam/cam.h>
   38 #include <cam/cam_ccb.h>
   39 #include <cam/cam_sim.h>
   40 #include <cam/cam_xpt_sim.h>
   41 #include <cam/cam_debug.h>
   42 #include <cam/cam_periph.h>
   43 
   44 #include <cam/scsi/scsi_all.h>
   45 #include <cam/scsi/scsi_message.h>
   46 #include <cam/scsi/scsi_da.h>
   47 
   48 #include <sys/kernel.h>
   49 
   50 #include "opt_vpo.h"
   51 
   52 #include <dev/ppbus/ppbconf.h>
   53 #include <dev/ppbus/vpoio.h>
   54 
   55 #include "ppbus_if.h"
   56 
   57 struct vpo_sense {
   58         struct scsi_sense cmd;
   59         unsigned int stat;
   60         unsigned int count;
   61 };
   62 
   63 struct vpo_data {
   64         unsigned short vpo_unit;
   65 
   66         int vpo_stat;
   67         int vpo_count;
   68         int vpo_error;
   69 
   70         int vpo_isplus;
   71 
   72         struct cam_sim  *sim;
   73 
   74         struct vpo_sense vpo_sense;
   75 
   76         struct vpoio_data vpo_io;       /* interface to low level functions */
   77 };
   78 
   79 #define DEVTOSOFTC(dev) \
   80         ((struct vpo_data *)device_get_softc(dev))
   81 
   82 /* cam related functions */
   83 static void     vpo_action(struct cam_sim *sim, union ccb *ccb);
   84 static void     vpo_poll(struct cam_sim *sim);
   85 static void     vpo_cam_rescan_callback(struct cam_periph *periph,
   86                                         union ccb *ccb);
   87 static void     vpo_cam_rescan(struct vpo_data *vpo);
   88 
   89 static void
   90 vpo_identify(driver_t *driver, device_t parent)
   91 {
   92 
   93         device_t dev;
   94 
   95         dev = device_find_child(parent, "vpo", 0);
   96         if (!dev)
   97                 BUS_ADD_CHILD(parent, 0, "vpo", -1);
   98 }
   99 
  100 /*
  101  * vpo_probe()
  102  */
  103 static int
  104 vpo_probe(device_t dev)
  105 {
  106         struct vpo_data *vpo;
  107         int error;
  108 
  109         vpo = DEVTOSOFTC(dev);
  110 
  111         /* vpo dependent initialisation */
  112         vpo->vpo_unit = device_get_unit(dev);
  113 
  114         /* low level probe */
  115         vpoio_set_unit(&vpo->vpo_io, vpo->vpo_unit);
  116 
  117         /* check ZIP before ZIP+ or imm_probe() will send controls to
  118          * the printer or whatelse connected to the port */
  119         if ((error = vpoio_probe(dev, &vpo->vpo_io)) == 0) {
  120                 vpo->vpo_isplus = 0;
  121                 device_set_desc(dev,
  122                                 "Iomega VPI0 Parallel to SCSI interface");
  123         } else if ((error = imm_probe(dev, &vpo->vpo_io)) == 0) {
  124                 vpo->vpo_isplus = 1;
  125                 device_set_desc(dev,
  126                                 "Iomega Matchmaker Parallel to SCSI interface");
  127         } else {
  128                 return (error);
  129         }
  130 
  131         return (0);
  132 }
  133 
  134 /*
  135  * vpo_attach()
  136  */
  137 static int
  138 vpo_attach(device_t dev)
  139 {
  140         struct vpo_data *vpo = DEVTOSOFTC(dev);
  141         struct cam_devq *devq;
  142         int error;
  143 
  144         /* low level attachment */
  145         if (vpo->vpo_isplus) {
  146                 if ((error = imm_attach(&vpo->vpo_io)))
  147                         return (error);
  148         } else {
  149                 if ((error = vpoio_attach(&vpo->vpo_io)))
  150                         return (error);
  151         }
  152 
  153         /*
  154         **      Now tell the generic SCSI layer
  155         **      about our bus.
  156         */
  157         devq = cam_simq_alloc(/*maxopenings*/1);
  158         /* XXX What about low-level detach on error? */
  159         if (devq == NULL)
  160                 return (ENXIO);
  161 
  162         vpo->sim = cam_sim_alloc(vpo_action, vpo_poll, "vpo", vpo,
  163                                  device_get_unit(dev),
  164                                  /*untagged*/1, /*tagged*/0, devq);
  165         if (vpo->sim == NULL) {
  166                 cam_simq_free(devq);
  167                 return (ENXIO);
  168         }
  169 
  170         if (xpt_bus_register(vpo->sim, /*bus*/0) != CAM_SUCCESS) {
  171                 cam_sim_free(vpo->sim, /*free_devq*/TRUE);
  172                 return (ENXIO);
  173         }
  174 
  175         /* all went ok */
  176 
  177         vpo_cam_rescan(vpo);    /* have CAM rescan the bus */
  178 
  179         return (0);
  180 }
  181 
  182 static void
  183 vpo_cam_rescan_callback(struct cam_periph *periph, union ccb *ccb)
  184 {
  185         free(ccb, M_TEMP);
  186 }
  187 
  188 static void
  189 vpo_cam_rescan(struct vpo_data *vpo)
  190 {
  191         struct cam_path *path;
  192         union ccb *ccb = malloc(sizeof(union ccb), M_TEMP, M_WAITOK | M_ZERO);
  193 
  194         if (xpt_create_path(&path, xpt_periph, cam_sim_path(vpo->sim), 0, 0)
  195             != CAM_REQ_CMP) {
  196                 /* A failure is benign as the user can do a manual rescan */
  197                 free(ccb, M_TEMP);
  198                 return;
  199         }
  200 
  201         xpt_setup_ccb(&ccb->ccb_h, path, 5/*priority (low)*/);
  202         ccb->ccb_h.func_code = XPT_SCAN_BUS;
  203         ccb->ccb_h.cbfcnp = vpo_cam_rescan_callback;
  204         ccb->crcn.flags = CAM_FLAG_NONE;
  205         xpt_action(ccb);
  206 
  207         /* The scan is in progress now. */
  208 }
  209 
  210 /*
  211  * vpo_intr()
  212  */
  213 static void
  214 vpo_intr(struct vpo_data *vpo, struct ccb_scsiio *csio)
  215 {
  216         int errno;      /* error in errno.h */
  217         int s;
  218 #ifdef VP0_DEBUG
  219         int i;
  220 #endif
  221 
  222         s = splcam();
  223 
  224         if (vpo->vpo_isplus) {
  225                 errno = imm_do_scsi(&vpo->vpo_io, VP0_INITIATOR,
  226                         csio->ccb_h.target_id,
  227                         (char *)&csio->cdb_io.cdb_bytes, csio->cdb_len,
  228                         (char *)csio->data_ptr, csio->dxfer_len,
  229                         &vpo->vpo_stat, &vpo->vpo_count, &vpo->vpo_error);
  230         } else {
  231                 errno = vpoio_do_scsi(&vpo->vpo_io, VP0_INITIATOR,
  232                         csio->ccb_h.target_id,
  233                         (char *)&csio->cdb_io.cdb_bytes, csio->cdb_len,
  234                         (char *)csio->data_ptr, csio->dxfer_len,
  235                         &vpo->vpo_stat, &vpo->vpo_count, &vpo->vpo_error);
  236         }
  237 
  238 #ifdef VP0_DEBUG
  239         printf("vpo_do_scsi = %d, status = 0x%x, count = %d, vpo_error = %d\n", 
  240                  errno, vpo->vpo_stat, vpo->vpo_count, vpo->vpo_error);
  241 
  242         /* dump of command */
  243         for (i=0; i<csio->cdb_len; i++)
  244                 printf("%x ", ((char *)&csio->cdb_io.cdb_bytes)[i]);
  245 
  246         printf("\n");
  247 #endif
  248 
  249         if (errno) {
  250                 /* connection to ppbus interrupted */
  251                 csio->ccb_h.status = CAM_CMD_TIMEOUT;
  252                 goto error;
  253         }
  254 
  255         /* if a timeout occured, no sense */
  256         if (vpo->vpo_error) {
  257                 if (vpo->vpo_error != VP0_ESELECT_TIMEOUT)
  258                         printf("vpo%d: VP0 error/timeout (%d)\n",
  259                                 vpo->vpo_unit, vpo->vpo_error);
  260 
  261                 csio->ccb_h.status = CAM_CMD_TIMEOUT;
  262                 goto error;
  263         }
  264 
  265         /* check scsi status */
  266         if (vpo->vpo_stat != SCSI_STATUS_OK) {
  267            csio->scsi_status = vpo->vpo_stat;
  268 
  269            /* check if we have to sense the drive */
  270            if ((vpo->vpo_stat & SCSI_STATUS_CHECK_COND) != 0) {
  271 
  272                 vpo->vpo_sense.cmd.opcode = REQUEST_SENSE;
  273                 vpo->vpo_sense.cmd.length = csio->sense_len;
  274                 vpo->vpo_sense.cmd.control = 0;
  275 
  276                 if (vpo->vpo_isplus) {
  277                         errno = imm_do_scsi(&vpo->vpo_io, VP0_INITIATOR,
  278                                 csio->ccb_h.target_id,
  279                                 (char *)&vpo->vpo_sense.cmd,
  280                                 sizeof(vpo->vpo_sense.cmd),
  281                                 (char *)&csio->sense_data, csio->sense_len,
  282                                 &vpo->vpo_sense.stat, &vpo->vpo_sense.count,
  283                                 &vpo->vpo_error);
  284                 } else {
  285                         errno = vpoio_do_scsi(&vpo->vpo_io, VP0_INITIATOR,
  286                                 csio->ccb_h.target_id,
  287                                 (char *)&vpo->vpo_sense.cmd,
  288                                 sizeof(vpo->vpo_sense.cmd),
  289                                 (char *)&csio->sense_data, csio->sense_len,
  290                                 &vpo->vpo_sense.stat, &vpo->vpo_sense.count,
  291                                 &vpo->vpo_error);
  292                 }
  293                         
  294 
  295 #ifdef VP0_DEBUG
  296                 printf("(sense) vpo_do_scsi = %d, status = 0x%x, count = %d, vpo_error = %d\n", 
  297                         errno, vpo->vpo_sense.stat, vpo->vpo_sense.count, vpo->vpo_error);
  298 #endif
  299 
  300                 /* check sense return status */
  301                 if (errno == 0 && vpo->vpo_sense.stat == SCSI_STATUS_OK) {
  302                    /* sense ok */
  303                    csio->ccb_h.status = CAM_AUTOSNS_VALID | CAM_SCSI_STATUS_ERROR;
  304                    csio->sense_resid = csio->sense_len - vpo->vpo_sense.count;
  305 
  306 #ifdef VP0_DEBUG
  307                    /* dump of sense info */
  308                    printf("(sense) ");
  309                    for (i=0; i<vpo->vpo_sense.count; i++)
  310                         printf("%x ", ((char *)&csio->sense_data)[i]);
  311                    printf("\n");
  312 #endif
  313 
  314                 } else {
  315                    /* sense failed */
  316                    csio->ccb_h.status = CAM_AUTOSENSE_FAIL;
  317                 }
  318            } else {
  319                 /* no sense */
  320                 csio->ccb_h.status = CAM_SCSI_STATUS_ERROR;                     
  321            }
  322 
  323            goto error;
  324         }
  325 
  326         csio->resid = csio->dxfer_len - vpo->vpo_count;
  327         csio->ccb_h.status = CAM_REQ_CMP;
  328 
  329 error:
  330         splx(s);
  331 
  332         return;
  333 }
  334 
  335 static void
  336 vpo_action(struct cam_sim *sim, union ccb *ccb)
  337 {
  338 
  339         struct vpo_data *vpo = (struct vpo_data *)sim->softc;
  340 
  341         switch (ccb->ccb_h.func_code) {
  342         case XPT_SCSI_IO:
  343         {
  344                 struct ccb_scsiio *csio;
  345 
  346                 csio = &ccb->csio;
  347 
  348 #ifdef VP0_DEBUG
  349                 printf("vpo%d: XPT_SCSI_IO (0x%x) request\n",
  350                         vpo->vpo_unit, csio->cdb_io.cdb_bytes[0]);
  351 #endif
  352                 
  353                 vpo_intr(vpo, csio);
  354 
  355                 xpt_done(ccb);
  356 
  357                 break;
  358         }
  359         case XPT_CALC_GEOMETRY:
  360         {
  361                 struct    ccb_calc_geometry *ccg;
  362 
  363                 ccg = &ccb->ccg;
  364 
  365 #ifdef VP0_DEBUG
  366                 printf("vpo%d: XPT_CALC_GEOMETRY (bs=%d,vs=%jd,c=%d,h=%d,spt=%d) request\n",
  367                         vpo->vpo_unit,
  368                         ccg->block_size,
  369                         (intmax_t)ccg->volume_size,
  370                         ccg->cylinders,
  371                         ccg->heads,
  372                         ccg->secs_per_track);
  373 #endif
  374 
  375                 ccg->heads = 64;
  376                 ccg->secs_per_track = 32;
  377                 ccg->cylinders = ccg->volume_size /
  378                                  (ccg->heads * ccg->secs_per_track);
  379 
  380                 ccb->ccb_h.status = CAM_REQ_CMP;
  381                 xpt_done(ccb);
  382                 break;
  383         }
  384         case XPT_RESET_BUS:             /* Reset the specified SCSI bus */
  385         {
  386 
  387 #ifdef VP0_DEBUG
  388                 printf("vpo%d: XPT_RESET_BUS request\n", vpo->vpo_unit);
  389 #endif
  390 
  391                 if (vpo->vpo_isplus) {
  392                         if (imm_reset_bus(&vpo->vpo_io)) {
  393                                 ccb->ccb_h.status = CAM_REQ_CMP_ERR;
  394                                 xpt_done(ccb);
  395                                 return;
  396                         }
  397                 } else {
  398                         if (vpoio_reset_bus(&vpo->vpo_io)) {
  399                                 ccb->ccb_h.status = CAM_REQ_CMP_ERR;
  400                                 xpt_done(ccb);
  401                                 return;
  402                         }
  403                 }
  404 
  405                 ccb->ccb_h.status = CAM_REQ_CMP;
  406                 xpt_done(ccb);
  407                 break;
  408         }
  409         case XPT_PATH_INQ:              /* Path routing inquiry */
  410         {
  411                 struct ccb_pathinq *cpi = &ccb->cpi;
  412                 
  413 #ifdef VP0_DEBUG
  414                 printf("vpo%d: XPT_PATH_INQ request\n", vpo->vpo_unit);
  415 #endif
  416                 cpi->version_num = 1; /* XXX??? */
  417                 cpi->hba_inquiry = 0;
  418                 cpi->target_sprt = 0;
  419                 cpi->hba_misc = 0;
  420                 cpi->hba_eng_cnt = 0;
  421                 cpi->max_target = 7;
  422                 cpi->max_lun = 0;
  423                 cpi->initiator_id = VP0_INITIATOR;
  424                 cpi->bus_id = sim->bus_id;
  425                 cpi->base_transfer_speed = 93;
  426                 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
  427                 strncpy(cpi->hba_vid, "Iomega", HBA_IDLEN);
  428                 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN);
  429                 cpi->unit_number = sim->unit_number;
  430 
  431                 cpi->ccb_h.status = CAM_REQ_CMP;
  432                 xpt_done(ccb);
  433                 break;
  434         }
  435         default:
  436                 ccb->ccb_h.status = CAM_REQ_INVALID;
  437                 xpt_done(ccb);
  438                 break;
  439         }
  440 
  441         return;
  442 }
  443 
  444 static void
  445 vpo_poll(struct cam_sim *sim)
  446 {       
  447         /* The ZIP is actually always polled throw vpo_action() */
  448         return;
  449 }
  450 
  451 static devclass_t vpo_devclass;
  452 
  453 static device_method_t vpo_methods[] = {
  454         /* device interface */
  455         DEVMETHOD(device_identify,      vpo_identify),
  456         DEVMETHOD(device_probe,         vpo_probe),
  457         DEVMETHOD(device_attach,        vpo_attach),
  458 
  459         { 0, 0 }
  460 };
  461 
  462 static driver_t vpo_driver = {
  463         "vpo",
  464         vpo_methods,
  465         sizeof(struct vpo_data),
  466 };
  467 DRIVER_MODULE(vpo, ppbus, vpo_driver, vpo_devclass, 0, 0);

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