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/7.3/sys/dev/ppbus/vpo.c 170872 2007-06-17 05:55:54Z scottl $");
   30 
   31 #include <sys/param.h>
   32 #include <sys/systm.h>
   33 #include <sys/module.h>
   34 #include <sys/bus.h>
   35 #include <sys/lock.h>
   36 #include <sys/mutex.h>
   37 #include <sys/malloc.h>
   38 
   39 #include <cam/cam.h>
   40 #include <cam/cam_ccb.h>
   41 #include <cam/cam_sim.h>
   42 #include <cam/cam_xpt_sim.h>
   43 #include <cam/cam_debug.h>
   44 #include <cam/cam_periph.h>
   45 
   46 #include <cam/scsi/scsi_all.h>
   47 #include <cam/scsi/scsi_message.h>
   48 #include <cam/scsi/scsi_da.h>
   49 
   50 #include <sys/kernel.h>
   51 
   52 #include "opt_vpo.h"
   53 
   54 #include <dev/ppbus/ppbconf.h>
   55 #include <dev/ppbus/vpoio.h>
   56 
   57 #include "ppbus_if.h"
   58 
   59 struct vpo_sense {
   60         struct scsi_sense cmd;
   61         unsigned int stat;
   62         unsigned int count;
   63 };
   64 
   65 struct vpo_data {
   66         unsigned short vpo_unit;
   67 
   68         int vpo_stat;
   69         int vpo_count;
   70         int vpo_error;
   71 
   72         int vpo_isplus;
   73 
   74         struct cam_sim  *sim;
   75 
   76         struct vpo_sense vpo_sense;
   77 
   78         struct vpoio_data vpo_io;       /* interface to low level functions */
   79 };
   80 
   81 #define DEVTOSOFTC(dev) \
   82         ((struct vpo_data *)device_get_softc(dev))
   83 
   84 /* cam related functions */
   85 static void     vpo_action(struct cam_sim *sim, union ccb *ccb);
   86 static void     vpo_poll(struct cam_sim *sim);
   87 static void     vpo_cam_rescan_callback(struct cam_periph *periph,
   88                                         union ccb *ccb);
   89 static void     vpo_cam_rescan(struct vpo_data *vpo);
   90 
   91 static void
   92 vpo_identify(driver_t *driver, device_t parent)
   93 {
   94 
   95         device_t dev;
   96 
   97         dev = device_find_child(parent, "vpo", 0);
   98         if (!dev)
   99                 BUS_ADD_CHILD(parent, 0, "vpo", -1);
  100 }
  101 
  102 /*
  103  * vpo_probe()
  104  */
  105 static int
  106 vpo_probe(device_t dev)
  107 {
  108         struct vpo_data *vpo;
  109         int error;
  110 
  111         vpo = DEVTOSOFTC(dev);
  112 
  113         /* vpo dependent initialisation */
  114         vpo->vpo_unit = device_get_unit(dev);
  115 
  116         /* low level probe */
  117         vpoio_set_unit(&vpo->vpo_io, vpo->vpo_unit);
  118 
  119         /* check ZIP before ZIP+ or imm_probe() will send controls to
  120          * the printer or whatelse connected to the port */
  121         if ((error = vpoio_probe(dev, &vpo->vpo_io)) == 0) {
  122                 vpo->vpo_isplus = 0;
  123                 device_set_desc(dev,
  124                                 "Iomega VPI0 Parallel to SCSI interface");
  125         } else if ((error = imm_probe(dev, &vpo->vpo_io)) == 0) {
  126                 vpo->vpo_isplus = 1;
  127                 device_set_desc(dev,
  128                                 "Iomega Matchmaker Parallel to SCSI interface");
  129         } else {
  130                 return (error);
  131         }
  132 
  133         return (0);
  134 }
  135 
  136 /*
  137  * vpo_attach()
  138  */
  139 static int
  140 vpo_attach(device_t dev)
  141 {
  142         struct vpo_data *vpo = DEVTOSOFTC(dev);
  143         struct cam_devq *devq;
  144         int error;
  145 
  146         /* low level attachment */
  147         if (vpo->vpo_isplus) {
  148                 if ((error = imm_attach(&vpo->vpo_io)))
  149                         return (error);
  150         } else {
  151                 if ((error = vpoio_attach(&vpo->vpo_io)))
  152                         return (error);
  153         }
  154 
  155         /*
  156         **      Now tell the generic SCSI layer
  157         **      about our bus.
  158         */
  159         devq = cam_simq_alloc(/*maxopenings*/1);
  160         /* XXX What about low-level detach on error? */
  161         if (devq == NULL)
  162                 return (ENXIO);
  163 
  164         vpo->sim = cam_sim_alloc(vpo_action, vpo_poll, "vpo", vpo,
  165                                  device_get_unit(dev), &Giant,
  166                                  /*untagged*/1, /*tagged*/0, devq);
  167         if (vpo->sim == NULL) {
  168                 cam_simq_free(devq);
  169                 return (ENXIO);
  170         }
  171 
  172         if (xpt_bus_register(vpo->sim, dev, /*bus*/0) != CAM_SUCCESS) {
  173                 cam_sim_free(vpo->sim, /*free_devq*/TRUE);
  174                 return (ENXIO);
  175         }
  176 
  177         /* all went ok */
  178 
  179         vpo_cam_rescan(vpo);    /* have CAM rescan the bus */
  180 
  181         return (0);
  182 }
  183 
  184 static void
  185 vpo_cam_rescan_callback(struct cam_periph *periph, union ccb *ccb)
  186 {
  187         free(ccb, M_TEMP);
  188 }
  189 
  190 static void
  191 vpo_cam_rescan(struct vpo_data *vpo)
  192 {
  193         struct cam_path *path;
  194         union ccb *ccb = malloc(sizeof(union ccb), M_TEMP, M_WAITOK | M_ZERO);
  195 
  196         if (xpt_create_path(&path, xpt_periph, cam_sim_path(vpo->sim), 0, 0)
  197             != CAM_REQ_CMP) {
  198                 /* A failure is benign as the user can do a manual rescan */
  199                 free(ccb, M_TEMP);
  200                 return;
  201         }
  202 
  203         xpt_setup_ccb(&ccb->ccb_h, path, 5/*priority (low)*/);
  204         ccb->ccb_h.func_code = XPT_SCAN_BUS;
  205         ccb->ccb_h.cbfcnp = vpo_cam_rescan_callback;
  206         ccb->crcn.flags = CAM_FLAG_NONE;
  207         xpt_action(ccb);
  208 
  209         /* The scan is in progress now. */
  210 }
  211 
  212 /*
  213  * vpo_intr()
  214  */
  215 static void
  216 vpo_intr(struct vpo_data *vpo, struct ccb_scsiio *csio)
  217 {
  218         int errno;      /* error in errno.h */
  219         int s;
  220 #ifdef VP0_DEBUG
  221         int i;
  222 #endif
  223 
  224         s = splcam();
  225 
  226         if (vpo->vpo_isplus) {
  227                 errno = imm_do_scsi(&vpo->vpo_io, VP0_INITIATOR,
  228                         csio->ccb_h.target_id,
  229                         (char *)&csio->cdb_io.cdb_bytes, csio->cdb_len,
  230                         (char *)csio->data_ptr, csio->dxfer_len,
  231                         &vpo->vpo_stat, &vpo->vpo_count, &vpo->vpo_error);
  232         } else {
  233                 errno = vpoio_do_scsi(&vpo->vpo_io, VP0_INITIATOR,
  234                         csio->ccb_h.target_id,
  235                         (char *)&csio->cdb_io.cdb_bytes, csio->cdb_len,
  236                         (char *)csio->data_ptr, csio->dxfer_len,
  237                         &vpo->vpo_stat, &vpo->vpo_count, &vpo->vpo_error);
  238         }
  239 
  240 #ifdef VP0_DEBUG
  241         printf("vpo_do_scsi = %d, status = 0x%x, count = %d, vpo_error = %d\n", 
  242                  errno, vpo->vpo_stat, vpo->vpo_count, vpo->vpo_error);
  243 
  244         /* dump of command */
  245         for (i=0; i<csio->cdb_len; i++)
  246                 printf("%x ", ((char *)&csio->cdb_io.cdb_bytes)[i]);
  247 
  248         printf("\n");
  249 #endif
  250 
  251         if (errno) {
  252                 /* connection to ppbus interrupted */
  253                 csio->ccb_h.status = CAM_CMD_TIMEOUT;
  254                 goto error;
  255         }
  256 
  257         /* if a timeout occured, no sense */
  258         if (vpo->vpo_error) {
  259                 if (vpo->vpo_error != VP0_ESELECT_TIMEOUT)
  260                         printf("vpo%d: VP0 error/timeout (%d)\n",
  261                                 vpo->vpo_unit, vpo->vpo_error);
  262 
  263                 csio->ccb_h.status = CAM_CMD_TIMEOUT;
  264                 goto error;
  265         }
  266 
  267         /* check scsi status */
  268         if (vpo->vpo_stat != SCSI_STATUS_OK) {
  269            csio->scsi_status = vpo->vpo_stat;
  270 
  271            /* check if we have to sense the drive */
  272            if ((vpo->vpo_stat & SCSI_STATUS_CHECK_COND) != 0) {
  273 
  274                 vpo->vpo_sense.cmd.opcode = REQUEST_SENSE;
  275                 vpo->vpo_sense.cmd.length = csio->sense_len;
  276                 vpo->vpo_sense.cmd.control = 0;
  277 
  278                 if (vpo->vpo_isplus) {
  279                         errno = imm_do_scsi(&vpo->vpo_io, VP0_INITIATOR,
  280                                 csio->ccb_h.target_id,
  281                                 (char *)&vpo->vpo_sense.cmd,
  282                                 sizeof(vpo->vpo_sense.cmd),
  283                                 (char *)&csio->sense_data, csio->sense_len,
  284                                 &vpo->vpo_sense.stat, &vpo->vpo_sense.count,
  285                                 &vpo->vpo_error);
  286                 } else {
  287                         errno = vpoio_do_scsi(&vpo->vpo_io, VP0_INITIATOR,
  288                                 csio->ccb_h.target_id,
  289                                 (char *)&vpo->vpo_sense.cmd,
  290                                 sizeof(vpo->vpo_sense.cmd),
  291                                 (char *)&csio->sense_data, csio->sense_len,
  292                                 &vpo->vpo_sense.stat, &vpo->vpo_sense.count,
  293                                 &vpo->vpo_error);
  294                 }
  295                         
  296 
  297 #ifdef VP0_DEBUG
  298                 printf("(sense) vpo_do_scsi = %d, status = 0x%x, count = %d, vpo_error = %d\n", 
  299                         errno, vpo->vpo_sense.stat, vpo->vpo_sense.count, vpo->vpo_error);
  300 #endif
  301 
  302                 /* check sense return status */
  303                 if (errno == 0 && vpo->vpo_sense.stat == SCSI_STATUS_OK) {
  304                    /* sense ok */
  305                    csio->ccb_h.status = CAM_AUTOSNS_VALID | CAM_SCSI_STATUS_ERROR;
  306                    csio->sense_resid = csio->sense_len - vpo->vpo_sense.count;
  307 
  308 #ifdef VP0_DEBUG
  309                    /* dump of sense info */
  310                    printf("(sense) ");
  311                    for (i=0; i<vpo->vpo_sense.count; i++)
  312                         printf("%x ", ((char *)&csio->sense_data)[i]);
  313                    printf("\n");
  314 #endif
  315 
  316                 } else {
  317                    /* sense failed */
  318                    csio->ccb_h.status = CAM_AUTOSENSE_FAIL;
  319                 }
  320            } else {
  321                 /* no sense */
  322                 csio->ccb_h.status = CAM_SCSI_STATUS_ERROR;                     
  323            }
  324 
  325            goto error;
  326         }
  327 
  328         csio->resid = csio->dxfer_len - vpo->vpo_count;
  329         csio->ccb_h.status = CAM_REQ_CMP;
  330 
  331 error:
  332         splx(s);
  333 
  334         return;
  335 }
  336 
  337 static void
  338 vpo_action(struct cam_sim *sim, union ccb *ccb)
  339 {
  340 
  341         struct vpo_data *vpo = (struct vpo_data *)sim->softc;
  342 
  343         switch (ccb->ccb_h.func_code) {
  344         case XPT_SCSI_IO:
  345         {
  346                 struct ccb_scsiio *csio;
  347 
  348                 csio = &ccb->csio;
  349 
  350 #ifdef VP0_DEBUG
  351                 printf("vpo%d: XPT_SCSI_IO (0x%x) request\n",
  352                         vpo->vpo_unit, csio->cdb_io.cdb_bytes[0]);
  353 #endif
  354                 
  355                 vpo_intr(vpo, csio);
  356 
  357                 xpt_done(ccb);
  358 
  359                 break;
  360         }
  361         case XPT_CALC_GEOMETRY:
  362         {
  363                 struct    ccb_calc_geometry *ccg;
  364 
  365                 ccg = &ccb->ccg;
  366 
  367 #ifdef VP0_DEBUG
  368                 printf("vpo%d: XPT_CALC_GEOMETRY (bs=%d,vs=%jd,c=%d,h=%d,spt=%d) request\n",
  369                         vpo->vpo_unit,
  370                         ccg->block_size,
  371                         (intmax_t)ccg->volume_size,
  372                         ccg->cylinders,
  373                         ccg->heads,
  374                         ccg->secs_per_track);
  375 #endif
  376 
  377                 ccg->heads = 64;
  378                 ccg->secs_per_track = 32;
  379                 ccg->cylinders = ccg->volume_size /
  380                                  (ccg->heads * ccg->secs_per_track);
  381 
  382                 ccb->ccb_h.status = CAM_REQ_CMP;
  383                 xpt_done(ccb);
  384                 break;
  385         }
  386         case XPT_RESET_BUS:             /* Reset the specified SCSI bus */
  387         {
  388 
  389 #ifdef VP0_DEBUG
  390                 printf("vpo%d: XPT_RESET_BUS request\n", vpo->vpo_unit);
  391 #endif
  392 
  393                 if (vpo->vpo_isplus) {
  394                         if (imm_reset_bus(&vpo->vpo_io)) {
  395                                 ccb->ccb_h.status = CAM_REQ_CMP_ERR;
  396                                 xpt_done(ccb);
  397                                 return;
  398                         }
  399                 } else {
  400                         if (vpoio_reset_bus(&vpo->vpo_io)) {
  401                                 ccb->ccb_h.status = CAM_REQ_CMP_ERR;
  402                                 xpt_done(ccb);
  403                                 return;
  404                         }
  405                 }
  406 
  407                 ccb->ccb_h.status = CAM_REQ_CMP;
  408                 xpt_done(ccb);
  409                 break;
  410         }
  411         case XPT_PATH_INQ:              /* Path routing inquiry */
  412         {
  413                 struct ccb_pathinq *cpi = &ccb->cpi;
  414                 
  415 #ifdef VP0_DEBUG
  416                 printf("vpo%d: XPT_PATH_INQ request\n", vpo->vpo_unit);
  417 #endif
  418                 cpi->version_num = 1; /* XXX??? */
  419                 cpi->hba_inquiry = 0;
  420                 cpi->target_sprt = 0;
  421                 cpi->hba_misc = 0;
  422                 cpi->hba_eng_cnt = 0;
  423                 cpi->max_target = 7;
  424                 cpi->max_lun = 0;
  425                 cpi->initiator_id = VP0_INITIATOR;
  426                 cpi->bus_id = sim->bus_id;
  427                 cpi->base_transfer_speed = 93;
  428                 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
  429                 strncpy(cpi->hba_vid, "Iomega", HBA_IDLEN);
  430                 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN);
  431                 cpi->unit_number = sim->unit_number;
  432 
  433                 cpi->ccb_h.status = CAM_REQ_CMP;
  434                 xpt_done(ccb);
  435                 break;
  436         }
  437         default:
  438                 ccb->ccb_h.status = CAM_REQ_INVALID;
  439                 xpt_done(ccb);
  440                 break;
  441         }
  442 
  443         return;
  444 }
  445 
  446 static void
  447 vpo_poll(struct cam_sim *sim)
  448 {       
  449         /* The ZIP is actually always polled throw vpo_action() */
  450         return;
  451 }
  452 
  453 static devclass_t vpo_devclass;
  454 
  455 static device_method_t vpo_methods[] = {
  456         /* device interface */
  457         DEVMETHOD(device_identify,      vpo_identify),
  458         DEVMETHOD(device_probe,         vpo_probe),
  459         DEVMETHOD(device_attach,        vpo_attach),
  460 
  461         { 0, 0 }
  462 };
  463 
  464 static driver_t vpo_driver = {
  465         "vpo",
  466         vpo_methods,
  467         sizeof(struct vpo_data),
  468 };
  469 DRIVER_MODULE(vpo, ppbus, vpo_driver, vpo_devclass, 0, 0);
  470 MODULE_DEPEND(vpo, ppbus, 1, 1, 1);
  471 MODULE_DEPEND(vpo, cam, 1, 1, 1);
Cache object: c891faf2957f3d632c3f721f912cd136
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FreeBSD/Linux Kernel Cross Reference sys/dev/ppbus/vpo.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/ppbus/vpo.c
