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("$FreeBSD$");
   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         device_t vpo_dev;
   67         int vpo_stat;
   68         int vpo_count;
   69         int vpo_error;
   70 
   71         int vpo_isplus;
   72 
   73         struct cam_sim  *sim;
   74 
   75         struct vpo_sense vpo_sense;
   76 
   77         struct vpoio_data vpo_io;       /* interface to low level functions */
   78 };
   79 
   80 #define DEVTOSOFTC(dev) \
   81         ((struct vpo_data *)device_get_softc(dev))
   82 
   83 /* cam related functions */
   84 static void     vpo_action(struct cam_sim *sim, union ccb *ccb);
   85 static void     vpo_poll(struct cam_sim *sim);
   86 
   87 static void
   88 vpo_identify(driver_t *driver, device_t parent)
   89 {
   90 
   91         device_t dev;
   92 
   93         dev = device_find_child(parent, "vpo", -1);
   94         if (!dev)
   95                 BUS_ADD_CHILD(parent, 0, "vpo", -1);
   96 }
   97 
   98 /*
   99  * vpo_probe()
  100  */
  101 static int
  102 vpo_probe(device_t dev)
  103 {
  104         device_t ppbus = device_get_parent(dev);
  105         struct vpo_data *vpo;
  106         int error;
  107 
  108         vpo = DEVTOSOFTC(dev);
  109         vpo->vpo_dev = dev;
  110 
  111         /* check ZIP before ZIP+ or imm_probe() will send controls to
  112          * the printer or whatelse connected to the port */
  113         ppb_lock(ppbus);
  114         if ((error = vpoio_probe(dev, &vpo->vpo_io)) == 0) {
  115                 vpo->vpo_isplus = 0;
  116                 device_set_desc(dev,
  117                                 "Iomega VPI0 Parallel to SCSI interface");
  118         } else if ((error = imm_probe(dev, &vpo->vpo_io)) == 0) {
  119                 vpo->vpo_isplus = 1;
  120                 device_set_desc(dev,
  121                                 "Iomega Matchmaker Parallel to SCSI interface");
  122         } else {
  123                 ppb_unlock(ppbus);
  124                 return (error);
  125         }
  126         ppb_unlock(ppbus);
  127 
  128         return (0);
  129 }
  130 
  131 /*
  132  * vpo_attach()
  133  */
  134 static int
  135 vpo_attach(device_t dev)
  136 {
  137         struct vpo_data *vpo = DEVTOSOFTC(dev);
  138         device_t ppbus = device_get_parent(dev);
  139         struct ppb_data *ppb = device_get_softc(ppbus); /* XXX: layering */
  140         struct cam_devq *devq;
  141         int error;
  142 
  143         /* low level attachment */
  144         if (vpo->vpo_isplus) {
  145                 if ((error = imm_attach(&vpo->vpo_io)))
  146                         return (error);
  147         } else {
  148                 if ((error = vpoio_attach(&vpo->vpo_io)))
  149                         return (error);
  150         }
  151 
  152         /*
  153         **      Now tell the generic SCSI layer
  154         **      about our bus.
  155         */
  156         devq = cam_simq_alloc(/*maxopenings*/1);
  157         /* XXX What about low-level detach on error? */
  158         if (devq == NULL)
  159                 return (ENXIO);
  160 
  161         vpo->sim = cam_sim_alloc(vpo_action, vpo_poll, "vpo", vpo,
  162                                  device_get_unit(dev), ppb->ppc_lock,
  163                                  /*untagged*/1, /*tagged*/0, devq);
  164         if (vpo->sim == NULL) {
  165                 cam_simq_free(devq);
  166                 return (ENXIO);
  167         }
  168 
  169         ppb_lock(ppbus);
  170         if (xpt_bus_register(vpo->sim, dev, /*bus*/0) != CAM_SUCCESS) {
  171                 cam_sim_free(vpo->sim, /*free_devq*/TRUE);
  172                 ppb_unlock(ppbus);
  173                 return (ENXIO);
  174         }
  175         ppb_unlock(ppbus);
  176 
  177         return (0);
  178 }
  179 
  180 /*
  181  * vpo_intr()
  182  */
  183 static void
  184 vpo_intr(struct vpo_data *vpo, struct ccb_scsiio *csio)
  185 {
  186         int errno;      /* error in errno.h */
  187 #ifdef VP0_DEBUG
  188         int i;
  189 #endif
  190 
  191         if (vpo->vpo_isplus) {
  192                 errno = imm_do_scsi(&vpo->vpo_io, VP0_INITIATOR,
  193                         csio->ccb_h.target_id,
  194                         (char *)&csio->cdb_io.cdb_bytes, csio->cdb_len,
  195                         (char *)csio->data_ptr, csio->dxfer_len,
  196                         &vpo->vpo_stat, &vpo->vpo_count, &vpo->vpo_error);
  197         } else {
  198                 errno = vpoio_do_scsi(&vpo->vpo_io, VP0_INITIATOR,
  199                         csio->ccb_h.target_id,
  200                         (char *)&csio->cdb_io.cdb_bytes, csio->cdb_len,
  201                         (char *)csio->data_ptr, csio->dxfer_len,
  202                         &vpo->vpo_stat, &vpo->vpo_count, &vpo->vpo_error);
  203         }
  204 
  205 #ifdef VP0_DEBUG
  206         printf("vpo_do_scsi = %d, status = 0x%x, count = %d, vpo_error = %d\n",
  207                  errno, vpo->vpo_stat, vpo->vpo_count, vpo->vpo_error);
  208 
  209         /* dump of command */
  210         for (i=0; i<csio->cdb_len; i++)
  211                 printf("%x ", ((char *)&csio->cdb_io.cdb_bytes)[i]);
  212 
  213         printf("\n");
  214 #endif
  215 
  216         if (errno) {
  217                 /* connection to ppbus interrupted */
  218                 csio->ccb_h.status = CAM_CMD_TIMEOUT;
  219                 return;
  220         }
  221 
  222         /* if a timeout occured, no sense */
  223         if (vpo->vpo_error) {
  224                 if (vpo->vpo_error != VP0_ESELECT_TIMEOUT)
  225                         device_printf(vpo->vpo_dev, "VP0 error/timeout (%d)\n",
  226                                 vpo->vpo_error);
  227 
  228                 csio->ccb_h.status = CAM_CMD_TIMEOUT;
  229                 return;
  230         }
  231 
  232         /* check scsi status */
  233         if (vpo->vpo_stat != SCSI_STATUS_OK) {
  234            csio->scsi_status = vpo->vpo_stat;
  235 
  236            /* check if we have to sense the drive */
  237            if ((vpo->vpo_stat & SCSI_STATUS_CHECK_COND) != 0) {
  238 
  239                 vpo->vpo_sense.cmd.opcode = REQUEST_SENSE;
  240                 vpo->vpo_sense.cmd.length = csio->sense_len;
  241                 vpo->vpo_sense.cmd.control = 0;
  242 
  243                 if (vpo->vpo_isplus) {
  244                         errno = imm_do_scsi(&vpo->vpo_io, VP0_INITIATOR,
  245                                 csio->ccb_h.target_id,
  246                                 (char *)&vpo->vpo_sense.cmd,
  247                                 sizeof(vpo->vpo_sense.cmd),
  248                                 (char *)&csio->sense_data, csio->sense_len,
  249                                 &vpo->vpo_sense.stat, &vpo->vpo_sense.count,
  250                                 &vpo->vpo_error);
  251                 } else {
  252                         errno = vpoio_do_scsi(&vpo->vpo_io, VP0_INITIATOR,
  253                                 csio->ccb_h.target_id,
  254                                 (char *)&vpo->vpo_sense.cmd,
  255                                 sizeof(vpo->vpo_sense.cmd),
  256                                 (char *)&csio->sense_data, csio->sense_len,
  257                                 &vpo->vpo_sense.stat, &vpo->vpo_sense.count,
  258                                 &vpo->vpo_error);
  259                 }
  260 
  261 
  262 #ifdef VP0_DEBUG
  263                 printf("(sense) vpo_do_scsi = %d, status = 0x%x, count = %d, vpo_error = %d\n",
  264                         errno, vpo->vpo_sense.stat, vpo->vpo_sense.count, vpo->vpo_error);
  265 #endif
  266 
  267                 /* check sense return status */
  268                 if (errno == 0 && vpo->vpo_sense.stat == SCSI_STATUS_OK) {
  269                    /* sense ok */
  270                    csio->ccb_h.status = CAM_AUTOSNS_VALID | CAM_SCSI_STATUS_ERROR;
  271                    csio->sense_resid = csio->sense_len - vpo->vpo_sense.count;
  272 
  273 #ifdef VP0_DEBUG
  274                    /* dump of sense info */
  275                    printf("(sense) ");
  276                    for (i=0; i<vpo->vpo_sense.count; i++)
  277                         printf("%x ", ((char *)&csio->sense_data)[i]);
  278                    printf("\n");
  279 #endif
  280 
  281                 } else {
  282                    /* sense failed */
  283                    csio->ccb_h.status = CAM_AUTOSENSE_FAIL;
  284                 }
  285            } else {
  286                 /* no sense */
  287                 csio->ccb_h.status = CAM_SCSI_STATUS_ERROR;
  288            }
  289 
  290            return;
  291         }
  292 
  293         csio->resid = csio->dxfer_len - vpo->vpo_count;
  294         csio->ccb_h.status = CAM_REQ_CMP;
  295 }
  296 
  297 static void
  298 vpo_action(struct cam_sim *sim, union ccb *ccb)
  299 {
  300         struct vpo_data *vpo = (struct vpo_data *)sim->softc;
  301 
  302         ppb_assert_locked(device_get_parent(vpo->vpo_dev));
  303         switch (ccb->ccb_h.func_code) {
  304         case XPT_SCSI_IO:
  305         {
  306                 struct ccb_scsiio *csio;
  307 
  308                 csio = &ccb->csio;
  309 
  310 #ifdef VP0_DEBUG
  311                 device_printf(vpo->vpo_dev, "XPT_SCSI_IO (0x%x) request\n",
  312                         csio->cdb_io.cdb_bytes[0]);
  313 #endif
  314 
  315                 vpo_intr(vpo, csio);
  316 
  317                 xpt_done(ccb);
  318 
  319                 break;
  320         }
  321         case XPT_CALC_GEOMETRY:
  322         {
  323                 struct    ccb_calc_geometry *ccg;
  324 
  325                 ccg = &ccb->ccg;
  326 
  327 #ifdef VP0_DEBUG
  328                 device_printf(vpo->vpo_dev, "XPT_CALC_GEOMETRY (bs=%d,vs=%jd,c=%d,h=%d,spt=%d) request\n",
  329                         ccg->block_size,
  330                         (intmax_t)ccg->volume_size,
  331                         ccg->cylinders,
  332                         ccg->heads,
  333                         ccg->secs_per_track);
  334 #endif
  335 
  336                 ccg->heads = 64;
  337                 ccg->secs_per_track = 32;
  338                 ccg->cylinders = ccg->volume_size /
  339                                  (ccg->heads * ccg->secs_per_track);
  340 
  341                 ccb->ccb_h.status = CAM_REQ_CMP;
  342                 xpt_done(ccb);
  343                 break;
  344         }
  345         case XPT_RESET_BUS:             /* Reset the specified SCSI bus */
  346         {
  347 
  348 #ifdef VP0_DEBUG
  349                 device_printf(vpo->vpo_dev, "XPT_RESET_BUS request\n");
  350 #endif
  351 
  352                 if (vpo->vpo_isplus) {
  353                         if (imm_reset_bus(&vpo->vpo_io)) {
  354                                 ccb->ccb_h.status = CAM_REQ_CMP_ERR;
  355                                 xpt_done(ccb);
  356                                 return;
  357                         }
  358                 } else {
  359                         if (vpoio_reset_bus(&vpo->vpo_io)) {
  360                                 ccb->ccb_h.status = CAM_REQ_CMP_ERR;
  361                                 xpt_done(ccb);
  362                                 return;
  363                         }
  364                 }
  365 
  366                 ccb->ccb_h.status = CAM_REQ_CMP;
  367                 xpt_done(ccb);
  368                 break;
  369         }
  370         case XPT_PATH_INQ:              /* Path routing inquiry */
  371         {
  372                 struct ccb_pathinq *cpi = &ccb->cpi;
  373 
  374 #ifdef VP0_DEBUG
  375                 device_printf(vpo->vpo_dev, "XPT_PATH_INQ request\n");
  376 #endif
  377                 cpi->version_num = 1; /* XXX??? */
  378                 cpi->hba_inquiry = 0;
  379                 cpi->target_sprt = 0;
  380                 cpi->hba_misc = 0;
  381                 cpi->hba_eng_cnt = 0;
  382                 cpi->max_target = 7;
  383                 cpi->max_lun = 0;
  384                 cpi->initiator_id = VP0_INITIATOR;
  385                 cpi->bus_id = sim->bus_id;
  386                 cpi->base_transfer_speed = 93;
  387                 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
  388                 strncpy(cpi->hba_vid, "Iomega", HBA_IDLEN);
  389                 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN);
  390                 cpi->unit_number = sim->unit_number;
  391                 cpi->transport = XPORT_PPB;
  392                 cpi->transport_version = 0;
  393 
  394                 cpi->ccb_h.status = CAM_REQ_CMP;
  395                 xpt_done(ccb);
  396                 break;
  397         }
  398         default:
  399                 ccb->ccb_h.status = CAM_REQ_INVALID;
  400                 xpt_done(ccb);
  401                 break;
  402         }
  403 
  404         return;
  405 }
  406 
  407 static void
  408 vpo_poll(struct cam_sim *sim)
  409 {
  410 
  411         /* The ZIP is actually always polled throw vpo_action(). */
  412 }
  413 
  414 static devclass_t vpo_devclass;
  415 
  416 static device_method_t vpo_methods[] = {
  417         /* device interface */
  418         DEVMETHOD(device_identify,      vpo_identify),
  419         DEVMETHOD(device_probe,         vpo_probe),
  420         DEVMETHOD(device_attach,        vpo_attach),
  421 
  422         { 0, 0 }
  423 };
  424 
  425 static driver_t vpo_driver = {
  426         "vpo",
  427         vpo_methods,
  428         sizeof(struct vpo_data),
  429 };
  430 DRIVER_MODULE(vpo, ppbus, vpo_driver, vpo_devclass, 0, 0);
  431 MODULE_DEPEND(vpo, ppbus, 1, 1, 1);
  432 MODULE_DEPEND(vpo, cam, 1, 1, 1);
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FreeBSD/Linux Kernel Cross Reference sys/dev/ppbus/vpo.c

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