ld_cac.c

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    1 /*      $NetBSD: ld_cac.c,v 1.31 2017/08/09 16:44:40 mlelstv Exp $      */
    2 
    3 /*-
    4  * Copyright (c) 2000, 2006 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  *
   19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   29  * POSSIBILITY OF SUCH DAMAGE.
   30  */
   31 
   32 /*
   33  * Compaq array controller front-end for ld(4) driver.
   34  */
   35 
   36 #include <sys/cdefs.h>
   37 __KERNEL_RCSID(0, "$NetBSD: ld_cac.c,v 1.31 2017/08/09 16:44:40 mlelstv Exp $");
   38 
   39 #include <sys/param.h>
   40 #include <sys/systm.h>
   41 #include <sys/kernel.h>
   42 #include <sys/device.h>
   43 #include <sys/buf.h>
   44 #include <sys/bufq.h>
   45 #include <sys/endian.h>
   46 #include <sys/dkio.h>
   47 #include <sys/disk.h>
   48 #include <sys/module.h>
   49 #include <sys/bus.h>
   50 
   51 #include <dev/ldvar.h>
   52 
   53 #include <dev/ic/cacreg.h>
   54 #include <dev/ic/cacvar.h>
   55 
   56 #include "ioconf.h"
   57 
   58 struct ld_cac_softc {
   59         struct  ld_softc sc_ld;
   60         kmutex_t *sc_mutex;
   61         int     sc_hwunit;
   62         int     sc_serrcnt;
   63         struct  timeval sc_serrtm;
   64 };
   65 
   66 void    ld_cac_attach(device_t, device_t, void *);
   67 void    ld_cac_done(device_t, void *, int);
   68 int     ld_cac_dump(struct ld_softc *, void *, int, int);
   69 int     ld_cac_match(device_t, cfdata_t, void *);
   70 int     ld_cac_start(struct ld_softc *, struct buf *);
   71 
   72 static const struct     timeval ld_cac_serrintvl = { 60, 0 };
   73 
   74 CFATTACH_DECL_NEW(ld_cac, sizeof(struct ld_cac_softc),
   75     ld_cac_match, ld_cac_attach, NULL, NULL);
   76 
   77 int
   78 ld_cac_match(device_t parent, cfdata_t match, void *aux)
   79 {
   80 
   81         return (1);
   82 }
   83 
   84 void
   85 ld_cac_attach(device_t parent, device_t self, void *aux)
   86 {
   87         struct cac_drive_info dinfo;
   88         struct cac_attach_args *caca;
   89         struct ld_cac_softc *sc = device_private(self);
   90         struct cac_softc *cac = device_private(parent);
   91         struct ld_softc *ld = &sc->sc_ld;
   92         const char *type;
   93 
   94         caca = aux;
   95         ld->sc_dv = self;
   96         sc->sc_mutex = &cac->sc_mutex;
   97         sc->sc_hwunit = caca->caca_unit;
   98 
   99         if (cac_cmd(cac, CAC_CMD_GET_LOG_DRV_INFO, &dinfo, sizeof(dinfo),
  100             sc->sc_hwunit, 0, CAC_CCB_DATA_IN, NULL)) {
  101                 aprint_error(": CMD_GET_LOG_DRV_INFO failed\n");
  102                 return;
  103         }
  104 
  105         ld->sc_secsize = CAC_GET2(dinfo.secsize);
  106         ld->sc_maxxfer = CAC_MAX_XFER;
  107         ld->sc_maxqueuecnt = (CAC_MAX_CCBS - 1) / cac->sc_nunits;
  108         ld->sc_secperunit = CAC_GET2(dinfo.ncylinders) *
  109             CAC_GET1(dinfo.nheads) * CAC_GET1(dinfo.nsectors);
  110         ld->sc_start = ld_cac_start;
  111         ld->sc_dump = ld_cac_dump;
  112 
  113         switch (CAC_GET1(dinfo.mirror)) {
  114         case 0:
  115                 type = "standalone disk or RAID0";
  116                 break;
  117         case 1:
  118                 type = "RAID4";
  119                 break;
  120         case 2:
  121                 type = "RAID1";
  122                 break;
  123         case 3:
  124                 type = "RAID5";
  125                 break;
  126         default:
  127                 type = "unknown type of";
  128                 break;
  129         }
  130 
  131         aprint_normal(": %s array\n", type);
  132 
  133         /* XXX We should verify this... */
  134         ld->sc_flags = LDF_ENABLED | LDF_MPSAFE;
  135         ldattach(ld, BUFQ_DISK_DEFAULT_STRAT);
  136 }
  137 
  138 int
  139 ld_cac_start(struct ld_softc *ld, struct buf *bp)
  140 {
  141         int flags, cmd;
  142         struct cac_softc *cac;
  143         struct ld_cac_softc *sc;
  144         struct cac_context cc;
  145 
  146         sc = (struct ld_cac_softc *)ld;
  147         cac = device_private(device_parent(ld->sc_dv));
  148 
  149         cc.cc_handler = ld_cac_done;
  150         cc.cc_context = bp;
  151         cc.cc_dv = ld->sc_dv;
  152 
  153         if ((bp->b_flags & B_READ) == 0) {
  154                 cmd = CAC_CMD_WRITE;
  155                 flags = CAC_CCB_DATA_OUT;
  156         } else {
  157                 cmd = CAC_CMD_READ;
  158                 flags = CAC_CCB_DATA_IN;
  159         }
  160 
  161         return (cac_cmd(cac, cmd, bp->b_data, bp->b_bcount, sc->sc_hwunit,
  162             bp->b_rawblkno, flags, &cc));
  163 }
  164 
  165 int
  166 ld_cac_dump(struct ld_softc *ld, void *data, int blkno, int blkcnt)
  167 {
  168         struct ld_cac_softc *sc;
  169 
  170         sc = (struct ld_cac_softc *)ld;
  171 
  172         return (cac_cmd(device_private(device_parent(ld->sc_dv)),
  173             CAC_CMD_WRITE_MEDIA, data, blkcnt * ld->sc_secsize,
  174             sc->sc_hwunit, blkno, CAC_CCB_DATA_OUT, NULL));
  175 }
  176 
  177 void
  178 ld_cac_done(device_t dv, void *context, int error)
  179 {
  180         struct buf *bp;
  181         struct ld_cac_softc *sc;
  182         int rv;
  183 
  184         bp = context;
  185         rv = 0;
  186         sc = device_private(dv);
  187 
  188         if ((error & CAC_RET_CMD_REJECTED) == CAC_RET_CMD_REJECTED) {
  189                 aprint_error_dev(dv, "command rejected\n");
  190                 rv = EIO;
  191         }
  192         if (rv == 0 && (error & CAC_RET_INVAL_BLOCK) != 0) {
  193                 aprint_error_dev(dv, "invalid request block\n");
  194                 rv = EIO;
  195         }
  196         if (rv == 0 && (error & CAC_RET_HARD_ERROR) != 0) {
  197                 aprint_error_dev(dv, "hard error\n");
  198                 rv = EIO;
  199         }
  200         if (rv == 0 && (error & CAC_RET_SOFT_ERROR) != 0) {
  201                 sc->sc_serrcnt++;
  202                 if (ratecheck(&sc->sc_serrtm, &ld_cac_serrintvl)) {
  203                         sc->sc_serrcnt = 0;
  204                         aprint_error_dev(dv,
  205                             "%d soft errors; array may be degraded\n",
  206                             sc->sc_serrcnt);
  207                 }
  208         }
  209 
  210         if (rv) {
  211                 bp->b_error = rv;
  212                 bp->b_resid = bp->b_bcount;
  213         } else
  214                 bp->b_resid = 0;
  215 
  216         mutex_exit(sc->sc_mutex);
  217         lddone(&sc->sc_ld, bp);
  218         mutex_enter(sc->sc_mutex);
  219 }
  220 
  221 MODULE(MODULE_CLASS_DRIVER, ld_cac, "ld,cac");
  222 
  223 #ifdef _MODULE
  224 /*
  225  * XXX Don't allow ioconf.c to redefine the "struct cfdriver ld_cd"
  226  * XXX it will be defined in the common-code module
  227  */
  228 #undef  CFDRIVER_DECL
  229 #define CFDRIVER_DECL(name, class, attr)
  230 #include "ioconf.c"
  231 #endif
  232         
  233 static int
  234 ld_cac_modcmd(modcmd_t cmd, void *opaque)
  235 {               
  236         int error = 0;
  237 #ifdef _MODULE
  238         /*
  239          * We ignore the cfdriver_vec[] that ioconf provides, since
  240          * the cfdrivers are attached already.
  241          */
  242         static struct cfdriver * const no_cfdriver_vec[] = { NULL };
  243 #endif
  244 
  245 #ifdef _MODULE
  246         switch (cmd) {
  247         case MODULE_CMD_INIT:
  248                 error = config_init_component(no_cfdriver_vec,
  249                     cfattach_ioconf_ld_cac, cfdata_ioconf_ld_cac);
  250                 break;
  251         case MODULE_CMD_FINI:
  252                 error = config_fini_component(no_cfdriver_vec,
  253                     cfattach_ioconf_ld_cac, cfdata_ioconf_ld_cac);
  254                 break;
  255         default:
  256                 error = ENOTTY;
  257                 break;
  258         }
  259 #endif
  260 
  261         return error;
  262 }

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

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