ld_mlx.c

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    1 /*      $NetBSD: ld_mlx.c,v 1.18.4.1 2009/01/16 22:58:33 bouyer Exp $   */
    2 
    3 /*-
    4  * Copyright (c) 2001 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  * Mylex DAC960 front-end for ld(4) driver.
   34  */
   35 
   36 #include <sys/cdefs.h>
   37 __KERNEL_RCSID(0, "$NetBSD: ld_mlx.c,v 1.18.4.1 2009/01/16 22:58:33 bouyer Exp $");
   38 
   39 #include "rnd.h"
   40 
   41 #include <sys/param.h>
   42 #include <sys/systm.h>
   43 #include <sys/kernel.h>
   44 #include <sys/device.h>
   45 #include <sys/buf.h>
   46 #include <sys/bufq.h>
   47 #include <sys/endian.h>
   48 #include <sys/dkio.h>
   49 #include <sys/disk.h>
   50 #if NRND > 0
   51 #include <sys/rnd.h>
   52 #endif
   53 
   54 #include <machine/vmparam.h>
   55 #include <sys/bus.h>
   56 
   57 #include <dev/ldvar.h>
   58 
   59 #include <dev/ic/mlxreg.h>
   60 #include <dev/ic/mlxio.h>
   61 #include <dev/ic/mlxvar.h>
   62 
   63 struct ld_mlx_softc {
   64         struct  ld_softc sc_ld;
   65         int     sc_hwunit;
   66 };
   67 
   68 static void     ld_mlx_attach(device_t, device_t, void *);
   69 static int      ld_mlx_detach(device_t, int);
   70 static int      ld_mlx_dobio(struct ld_mlx_softc *, void *, int, int, int,
   71                              struct buf *);
   72 static int      ld_mlx_dump(struct ld_softc *, void *, int, int);
   73 static void     ld_mlx_handler(struct mlx_ccb *);
   74 static int      ld_mlx_match(device_t, cfdata_t, void *);
   75 static int      ld_mlx_start(struct ld_softc *, struct buf *);
   76 
   77 CFATTACH_DECL_NEW(ld_mlx, sizeof(struct ld_mlx_softc),
   78     ld_mlx_match, ld_mlx_attach, ld_mlx_detach, NULL);
   79 
   80 static int
   81 ld_mlx_match(device_t parent, cfdata_t match, void *aux)
   82 {
   83 
   84         return (1);
   85 }
   86 
   87 static void
   88 ld_mlx_attach(device_t parent, device_t self, void *aux)
   89 {
   90         struct mlx_attach_args *mlxa = aux;
   91         struct ld_mlx_softc *sc = device_private(self);
   92         struct ld_softc *ld = &sc->sc_ld;
   93         struct mlx_softc *mlx = device_private(parent);
   94         struct mlx_sysdrive *ms = &mlx->mlx_sysdrive[mlxa->mlxa_unit];
   95         const char *statestr;
   96 
   97         ld->sc_dv = self;
   98 
   99         sc->sc_hwunit = mlxa->mlxa_unit;
  100         ld->sc_maxxfer = MLX_MAX_XFER;
  101         ld->sc_secsize = MLX_SECTOR_SIZE;
  102         ld->sc_maxqueuecnt = 1;
  103         ld->sc_start = ld_mlx_start;
  104         ld->sc_dump = ld_mlx_dump;
  105         ld->sc_secperunit = ms->ms_size;
  106 
  107         /*
  108          * Report on current status, and attach to the ld driver proper.
  109          */
  110         switch (ms->ms_state) {
  111         case MLX_SYSD_ONLINE:
  112                 statestr = "online";
  113                 ld->sc_flags = LDF_ENABLED;
  114                 break;
  115 
  116         case MLX_SYSD_CRITICAL:
  117                 statestr = "critical";
  118                 ld->sc_flags = LDF_ENABLED;
  119                 break;
  120 
  121         case MLX_SYSD_OFFLINE:
  122                 statestr = "offline";
  123                 break;
  124 
  125         default:
  126                 statestr = "state unknown";
  127                 break;
  128         }
  129 
  130         if (ms->ms_raidlevel == MLX_SYS_DRV_JBOD)
  131                 aprint_normal(": JBOD, %s\n", statestr);
  132         else
  133                 aprint_normal(": RAID%d, %s\n", ms->ms_raidlevel, statestr);
  134 
  135         ldattach(ld);
  136 }
  137 
  138 static int
  139 ld_mlx_detach(device_t dv, int flags)
  140 {
  141         struct ld_mlx_softc *sc = device_private(dv);
  142         struct ld_softc *ld = &sc->sc_ld;
  143         struct mlx_softc *mlx = device_private(device_parent(dv));
  144         int rv;
  145 
  146         if ((rv = ldbegindetach(ld, flags)) != 0)
  147                 return (rv);
  148         ldenddetach(ld);
  149         mlx_flush(mlx, 1);
  150 
  151         return (0);
  152 }
  153 
  154 static int
  155 ld_mlx_dobio(struct ld_mlx_softc *sc, void *data, int datasize, int blkno,
  156              int dowrite, struct buf *bp)
  157 {
  158         struct mlx_ccb *mc;
  159         struct mlx_softc *mlx;
  160         int s, rv;
  161         bus_addr_t sgphys;
  162 
  163         mlx = device_private(device_parent(sc->sc_ld.sc_dv));
  164 
  165         if ((rv = mlx_ccb_alloc(mlx, &mc, bp == NULL)) != 0)
  166                 return (rv);
  167 
  168         /* Map the data transfer. */
  169         rv = mlx_ccb_map(mlx, mc, data, datasize,
  170             dowrite ? MC_XFER_OUT : MC_XFER_IN);
  171         if (rv != 0) {
  172                 mlx_ccb_free(mlx, mc);
  173                 return (rv);
  174         }
  175 
  176         /* Build the command. */
  177         sgphys = mlx->mlx_sgls_paddr + (MLX_SGL_SIZE * mc->mc_ident);
  178         datasize /= MLX_SECTOR_SIZE;
  179 
  180         if (mlx->mlx_ci.ci_iftype <= 2)
  181                 mlx_make_type1(mc,
  182                     dowrite ? MLX_CMD_WRITESG_OLD : MLX_CMD_READSG_OLD,
  183                     datasize & 0xff, blkno, sc->sc_hwunit, sgphys,
  184                     mc->mc_nsgent);
  185         else
  186                 mlx_make_type5(mc,
  187                     dowrite ? MLX_CMD_WRITESG : MLX_CMD_READSG,
  188                     datasize & 0xff,
  189                     (sc->sc_hwunit << 3) | ((datasize >> 8) & 0x07),
  190                     blkno, sgphys, mc->mc_nsgent);
  191 
  192         if (bp == NULL) {
  193                 s = splbio();
  194                 rv = mlx_ccb_poll(mlx, mc, 10000);
  195                 mlx_ccb_unmap(mlx, mc);
  196                 mlx_ccb_free(mlx, mc);
  197                 splx(s);
  198         } else {
  199                 mc->mc_mx.mx_handler = ld_mlx_handler;
  200                 mc->mc_mx.mx_context = bp;
  201                 mc->mc_mx.mx_dv = sc->sc_ld.sc_dv;
  202                 mlx_ccb_enqueue(mlx, mc);
  203                 rv = 0;
  204         }
  205 
  206         return (rv);
  207 }
  208 
  209 static int
  210 ld_mlx_start(struct ld_softc *ld, struct buf *bp)
  211 {
  212 
  213         return (ld_mlx_dobio((struct ld_mlx_softc *)ld, bp->b_data,
  214             bp->b_bcount, bp->b_rawblkno, (bp->b_flags & B_READ) == 0, bp));
  215 }
  216 
  217 static void
  218 ld_mlx_handler(struct mlx_ccb *mc)
  219 {
  220         struct buf *bp;
  221         struct mlx_context *mx;
  222         struct ld_mlx_softc *sc;
  223         struct mlx_softc *mlx;
  224 
  225         mx = &mc->mc_mx;
  226         bp = mx->mx_context;
  227         sc = device_private(mx->mx_dv);
  228         mlx = device_private(device_parent(sc->sc_ld.sc_dv));
  229 
  230         if (mc->mc_status != MLX_STATUS_OK) {
  231                 bp->b_error = EIO;
  232                 bp->b_resid = bp->b_bcount;
  233 
  234                 if (mc->mc_status == MLX_STATUS_RDWROFFLINE)
  235                         printf("%s: drive offline\n",
  236                             device_xname(sc->sc_ld.sc_dv));
  237                 else
  238                         printf("%s: I/O error - %s\n",
  239                             device_xname(sc->sc_ld.sc_dv),
  240                             mlx_ccb_diagnose(mc));
  241         } else
  242                 bp->b_resid = 0;
  243 
  244         mlx_ccb_unmap(mlx, mc);
  245         mlx_ccb_free(mlx, mc);
  246         lddone(&sc->sc_ld, bp);
  247 }
  248 
  249 static int
  250 ld_mlx_dump(struct ld_softc *ld, void *data, int blkno, int blkcnt)
  251 {
  252 
  253         return (ld_mlx_dobio((struct ld_mlx_softc *)ld, data,
  254             blkcnt * ld->sc_secsize, blkno, 1, NULL));
  255 }

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

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