icpsp.c

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    1 /*      $NetBSD: icpsp.c,v 1.11 2005/02/27 00:27:01 perry Exp $ */
    2 
    3 /*-
    4  * Copyright (c) 2002 The NetBSD Foundation, Inc.
    5  * All rights reserved.
    6  *
    7  * This code is derived from software contributed to The NetBSD Foundation
    8  * by Andrew Doran.
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  * 3. All advertising materials mentioning features or use of this software
   19  *    must display the following acknowledgement:
   20  *        This product includes software developed by the NetBSD
   21  *        Foundation, Inc. and its contributors.
   22  * 4. Neither the name of The NetBSD Foundation nor the names of its
   23  *    contributors may be used to endorse or promote products derived
   24  *    from this software without specific prior written permission.
   25  *
   26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   36  * POSSIBILITY OF SUCH DAMAGE.
   37  */
   38 
   39 #include <sys/cdefs.h>
   40 __KERNEL_RCSID(0, "$NetBSD: icpsp.c,v 1.11 2005/02/27 00:27:01 perry Exp $");
   41 
   42 #include <sys/param.h>
   43 #include <sys/systm.h>
   44 #include <sys/kernel.h>
   45 #include <sys/device.h>
   46 #include <sys/queue.h>
   47 #include <sys/proc.h>
   48 #include <sys/buf.h>
   49 #include <sys/endian.h>
   50 #include <sys/malloc.h>
   51 #include <sys/scsiio.h>
   52 #include <sys/lock.h>
   53 
   54 #include <machine/bswap.h>
   55 #include <machine/bus.h>
   56 
   57 #include <uvm/uvm_extern.h>
   58 
   59 #include <dev/scsipi/scsi_all.h>
   60 #include <dev/scsipi/scsi_disk.h>
   61 #include <dev/scsipi/scsipi_all.h>
   62 #include <dev/scsipi/scsiconf.h>
   63 #include <dev/scsipi/scsi_message.h>
   64 
   65 #include <dev/ic/icpreg.h>
   66 #include <dev/ic/icpvar.h>
   67 
   68 struct icpsp_softc {
   69         struct  device sc_dv;
   70         struct  scsipi_adapter sc_adapter;
   71         struct  scsipi_channel sc_channel;
   72         int     sc_busno;
   73         int     sc_openings;
   74 };
   75 
   76 void    icpsp_attach(struct device *, struct device *, void *);
   77 void    icpsp_intr(struct icp_ccb *);
   78 int     icpsp_match(struct device *, struct cfdata *, void *);
   79 void    icpsp_scsipi_request(struct scsipi_channel *, scsipi_adapter_req_t,
   80                              void *);
   81 
   82 void    icpsp_adjqparam(struct device *, int);
   83 
   84 CFATTACH_DECL(icpsp, sizeof(struct icpsp_softc),
   85     icpsp_match, icpsp_attach, NULL, NULL);
   86 
   87 static const struct icp_servicecb icpsp_servicecb = {
   88         icpsp_adjqparam,
   89 };
   90 
   91 int
   92 icpsp_match(struct device *parent, struct cfdata *match, void *aux)
   93 {
   94         struct icp_attach_args *icpa;
   95 
   96         icpa = aux;
   97 
   98         return (icpa->icpa_unit >= ICPA_UNIT_SCSI);
   99 }
  100 
  101 void
  102 icpsp_attach(struct device *parent, struct device *self, void *aux)
  103 {
  104         struct icp_attach_args *icpa;
  105         struct icpsp_softc *sc;
  106         struct icp_softc *icp;
  107 
  108         icpa = (struct icp_attach_args *)aux;
  109         sc = (struct icpsp_softc *)self;
  110         icp = (struct icp_softc *)parent;
  111 
  112         sc->sc_busno = icpa->icpa_unit - ICPA_UNIT_SCSI;
  113         sc->sc_openings = icp->icp_openings;
  114         printf(": physical SCSI channel %d\n", sc->sc_busno);
  115 
  116         icp_register_servicecb(icp, icpa->icpa_unit, &icpsp_servicecb);
  117 
  118         sc->sc_adapter.adapt_dev = &sc->sc_dv;
  119         sc->sc_adapter.adapt_nchannels = 1;
  120         sc->sc_adapter.adapt_openings = icp->icp_openings;
  121         sc->sc_adapter.adapt_max_periph = icp->icp_openings;
  122         sc->sc_adapter.adapt_minphys = minphys;
  123         sc->sc_adapter.adapt_request = icpsp_scsipi_request;
  124 
  125         sc->sc_channel.chan_adapter = &sc->sc_adapter;
  126         sc->sc_channel.chan_bustype = &scsi_bustype;
  127         sc->sc_channel.chan_channel = 0;
  128         sc->sc_channel.chan_ntargets = ((icp->icp_class & ICP_FC) != 0 ?
  129             127 : 16); /* XXX bogus check */
  130         sc->sc_channel.chan_nluns = 8;
  131         sc->sc_channel.chan_id = icp->icp_bus_id[sc->sc_busno];
  132         sc->sc_channel.chan_flags = SCSIPI_CHAN_NOSETTLE;
  133 
  134         config_found(self, &sc->sc_channel, scsiprint);
  135 }
  136 
  137 void
  138 icpsp_scsipi_request(struct scsipi_channel *chan, scsipi_adapter_req_t req,
  139                      void *arg)
  140 {
  141         struct scsipi_xfer *xs;
  142         struct scsipi_periph *periph;
  143         struct icpsp_softc *sc;
  144         struct icp_rawcmd *rc;
  145         struct icp_softc *icp;
  146         struct icp_ccb *ic;
  147         int rv, flags, s, soff;
  148 
  149         sc = (void *)chan->chan_adapter->adapt_dev;
  150         icp = (struct icp_softc *)sc->sc_dv.dv_parent;
  151 
  152         switch (req) {
  153         case ADAPTER_REQ_RUN_XFER:
  154                 xs = arg;
  155                 periph = xs->xs_periph;
  156                 flags = xs->xs_control;
  157 
  158                 SC_DEBUG(periph, SCSIPI_DB2, ("icpsp_scsi_request run_xfer\n"));
  159 
  160                 if ((flags & XS_CTL_RESET) != 0) {
  161                         /* XXX Unimplemented. */
  162                         xs->error = XS_DRIVER_STUFFUP;
  163                         scsipi_done(xs);
  164                         return;
  165                 }
  166 
  167 #if defined(ICP_DEBUG) || defined(SCSIDEBUG)
  168                 if (xs->cmdlen > sizeof(rc->rc_cdb))
  169                         panic("%s: CDB too large", sc->sc_dv.dv_xname);
  170 #endif
  171 
  172                 /*
  173                  * Allocate a CCB.
  174                  */
  175                 if (__predict_false((ic = icp_ccb_alloc(icp)) == NULL)) {
  176                         xs->error = XS_RESOURCE_SHORTAGE;
  177                         scsipi_done(xs);
  178                         return;
  179                 }
  180                 rc = &ic->ic_cmd.cmd_packet.rc;
  181                 ic->ic_sg = rc->rc_sg;
  182                 ic->ic_service = ICP_SCSIRAWSERVICE;
  183                 soff = ICP_SCRATCH_SENSE + ic->ic_ident *
  184                     sizeof(struct scsi_sense_data);
  185 
  186                 /*
  187                  * Build the command.  We don't need to actively prevent
  188                  * access to array components, since the controller kindly
  189                  * takes care of that for us.
  190                  */
  191                 ic->ic_cmd.cmd_opcode = htole16(ICP_WRITE);
  192                 memcpy(rc->rc_cdb, xs->cmd, xs->cmdlen);
  193 
  194                 rc->rc_padding0 = 0;
  195                 rc->rc_direction = htole32((flags & XS_CTL_DATA_IN) != 0 ?
  196                     ICP_DATA_IN : ICP_DATA_OUT);
  197                 rc->rc_mdisc_time = 0;
  198                 rc->rc_mcon_time = 0;
  199                 rc->rc_clen = htole32(xs->cmdlen);
  200                 rc->rc_target = periph->periph_target;
  201                 rc->rc_lun = periph->periph_lun;
  202                 rc->rc_bus = sc->sc_busno;
  203                 rc->rc_priority = 0;
  204                 rc->rc_sense_len = htole32(sizeof(xs->sense.scsi_sense));
  205                 rc->rc_sense_addr =
  206                     htole32(soff + icp->icp_scr_seg[0].ds_addr);
  207                 rc->rc_padding1 = 0;
  208 
  209                 if (xs->datalen != 0) {
  210                         rv = icp_ccb_map(icp, ic, xs->data, xs->datalen,
  211                            (flags & XS_CTL_DATA_IN) != 0 ? IC_XFER_IN :
  212                            IC_XFER_OUT);
  213                         if (rv != 0) {
  214                                 icp_ccb_free(icp, ic);
  215                                 xs->error = XS_DRIVER_STUFFUP;
  216                                 scsipi_done(xs);
  217                                 return;
  218                         }
  219 
  220                         rc->rc_nsgent = htole32(ic->ic_nsgent);
  221                         rc->rc_sdata = ~0;
  222                         rc->rc_sdlen = htole32(xs->datalen);
  223                 } else {
  224                         rc->rc_nsgent = 0;
  225                         rc->rc_sdata = 0;
  226                         rc->rc_sdlen = 0;
  227                 }
  228 
  229                 ic->ic_cmdlen = (u_long)ic->ic_sg - (u_long)&ic->ic_cmd +
  230                     ic->ic_nsgent * sizeof(*ic->ic_sg);
  231 
  232                 bus_dmamap_sync(icp->icp_dmat, icp->icp_scr_dmamap, soff,
  233                     sizeof(xs->sense.scsi_sense), BUS_DMASYNC_PREREAD);
  234 
  235                 /*
  236                  * Fire it off to the controller.
  237                  */
  238                 ic->ic_intr = icpsp_intr;
  239                 ic->ic_context = xs;
  240                 ic->ic_dv = &sc->sc_dv;
  241 
  242                 if ((flags & XS_CTL_POLL) != 0) {
  243                         s = splbio();
  244                         rv = icp_ccb_poll(icp, ic, xs->timeout);
  245                         if (rv != 0) {
  246                                 if (xs->datalen != 0)
  247                                         icp_ccb_unmap(icp, ic);
  248                                 icp_ccb_free(icp, ic);
  249                                 xs->error = XS_TIMEOUT;
  250                                 scsipi_done(xs);
  251 
  252                                 /*
  253                                  * XXX We're now in a bad way, because we
  254                                  * don't know how to abort the command.
  255                                  * That shouldn't matter too much, since
  256                                  * polled commands won't be used while the
  257                                  * system is running.
  258                                  */
  259                         }
  260                         splx(s);
  261                 } else
  262                         icp_ccb_enqueue(icp, ic);
  263 
  264                 break;
  265 
  266         case ADAPTER_REQ_GROW_RESOURCES:
  267         case ADAPTER_REQ_SET_XFER_MODE:
  268                 /*
  269                  * Neither of these cases are supported, and neither of them
  270                  * is particulatly relevant, since we have an abstract view
  271                  * of the bus; the controller takes care of all the nitty
  272                  * gritty.
  273                  */
  274                 break;
  275         }
  276 }
  277 
  278 void
  279 icpsp_intr(struct icp_ccb *ic)
  280 {
  281         struct scsipi_xfer *xs;
  282         struct icpsp_softc *sc;
  283         struct icp_softc *icp;
  284         int soff;
  285 
  286         sc = (struct icpsp_softc *)ic->ic_dv;
  287         xs = (struct scsipi_xfer *)ic->ic_context;
  288         icp = (struct icp_softc *)ic->ic_dv->dv_parent;
  289         soff = ICP_SCRATCH_SENSE + ic->ic_ident *
  290             sizeof(struct scsi_sense_data);
  291 
  292         SC_DEBUG(xs->xs_periph, SCSIPI_DB2, ("icpsp_intr\n"));
  293 
  294         bus_dmamap_sync(icp->icp_dmat, icp->icp_scr_dmamap, soff,
  295             sizeof(xs->sense.scsi_sense), BUS_DMASYNC_POSTREAD);
  296 
  297         if (ic->ic_status == ICP_S_OK) {
  298                 xs->status = SCSI_OK;
  299                 xs->resid = 0;
  300         } else if (ic->ic_status != ICP_S_RAW_SCSI || icp->icp_info >= 0x100) {
  301                 xs->error = XS_SELTIMEOUT;
  302                 xs->resid = xs->datalen;
  303         } else {
  304                 xs->status = icp->icp_info;
  305 
  306                 switch (xs->status) {
  307                 case SCSI_OK:
  308 #ifdef DIAGNOSTIC
  309                         printf("%s: error return (%d), but SCSI_OK?\n",
  310                             sc->sc_dv.dv_xname, icp->icp_info);
  311 #endif
  312                         xs->resid = 0;
  313                         break;
  314                 case SCSI_CHECK:
  315                         memcpy(&xs->sense.scsi_sense, icp->icp_scr + soff,
  316                             sizeof(xs->sense.scsi_sense));
  317                         xs->error = XS_SENSE;
  318                         /* FALLTHROUGH */
  319                 default:
  320                         /*
  321                          * XXX Don't know how to get residual count.
  322                          */
  323                         xs->resid = xs->datalen;
  324                         break;
  325                 }
  326         }
  327 
  328         if (xs->datalen != 0)
  329                 icp_ccb_unmap(icp, ic);
  330         icp_ccb_free(icp, ic);
  331         scsipi_done(xs);
  332 }
  333 
  334 void
  335 icpsp_adjqparam(struct device *dv, int openings)
  336 {
  337         struct icpsp_softc *sc = (struct icpsp_softc *) dv;
  338         int s;
  339 
  340         s = splbio();
  341         sc->sc_adapter.adapt_openings += openings - sc->sc_openings;
  342         sc->sc_openings = openings;
  343         splx(s);
  344 }
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FreeBSD/Linux Kernel Cross Reference sys/dev/ic/icpsp.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/ic/icpsp.c
