The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

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

Version: -  FREEBSD  -  FREEBSD-13-STABLE  -  FREEBSD-13-0  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  l41  -  OPENBSD  -  linux-2.6  -  MK84  -  PLAN9  -  xnu-8792 
SearchContext: -  none  -  3  -  10 

    1 /*      $NetBSD: ld_aac.c,v 1.5 2002/10/02 16:33:33 thorpej 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: ld_aac.c,v 1.5 2002/10/02 16:33:33 thorpej Exp $");
   41 
   42 #include "rnd.h"
   43 
   44 #include <sys/param.h>
   45 #include <sys/systm.h>
   46 #include <sys/kernel.h>
   47 #include <sys/device.h>
   48 #include <sys/buf.h>
   49 #include <sys/endian.h>
   50 #include <sys/dkio.h>
   51 #include <sys/disk.h>
   52 #if NRND > 0
   53 #include <sys/rnd.h>
   54 #endif
   55 
   56 #include <machine/bus.h>
   57 
   58 #include <uvm/uvm_extern.h>
   59 
   60 #include <dev/ldvar.h>
   61 
   62 #include <dev/ic/aacreg.h>
   63 #include <dev/ic/aacvar.h>
   64 
   65 struct ld_aac_softc {
   66         struct  ld_softc sc_ld;
   67         int     sc_hwunit;
   68 };
   69 
   70 static void     ld_aac_attach(struct device *, struct device *, void *);
   71 static void     ld_aac_intr(struct aac_ccb *);
   72 static int      ld_aac_dobio(struct ld_aac_softc *, void *, int, int, int,
   73                              struct buf *);
   74 static int      ld_aac_dump(struct ld_softc *, void *, int, int);
   75 static int      ld_aac_match(struct device *, struct cfdata *, void *);
   76 static int      ld_aac_start(struct ld_softc *, struct buf *);
   77 
   78 CFATTACH_DECL(ld_aac, sizeof(struct ld_aac_softc),
   79     ld_aac_match, ld_aac_attach, NULL, NULL);
   80 
   81 static int
   82 ld_aac_match(struct device *parent, struct cfdata *match, void *aux)
   83 {
   84 
   85         return (1);
   86 }
   87 
   88 static void
   89 ld_aac_attach(struct device *parent, struct device *self, void *aux)
   90 {
   91         struct aac_attach_args *aaca;
   92         struct aac_drive *hdr;
   93         struct ld_aac_softc *sc;
   94         struct ld_softc *ld;
   95         struct aac_softc *aac;
   96 
   97         aaca = aux;
   98         aac = (struct aac_softc *)parent;
   99         sc = (struct ld_aac_softc *)self;
  100         ld = &sc->sc_ld;
  101         hdr = &aac->sc_hdr[aaca->aaca_unit];
  102 
  103         sc->sc_hwunit = aaca->aaca_unit;
  104         ld->sc_flags = LDF_ENABLED;
  105         ld->sc_maxxfer = AAC_MAX_XFER;
  106         ld->sc_secperunit = hdr->hd_size;
  107         ld->sc_secsize = AAC_SECTOR_SIZE;
  108         ld->sc_maxqueuecnt = (AAC_NCCBS - AAC_NCCBS_RESERVE) / aac->sc_nunits;
  109         ld->sc_start = ld_aac_start;
  110         ld->sc_dump = ld_aac_dump;
  111 
  112         printf(": %s\n", 
  113             aac_describe_code(aac_container_types, hdr->hd_devtype));
  114         ldattach(ld);
  115 }
  116 
  117 static int
  118 ld_aac_dobio(struct ld_aac_softc *sc, void *data, int datasize, int blkno,
  119              int dowrite, struct buf *bp)
  120 {
  121         struct aac_blockread_response *brr;
  122         struct aac_blockwrite_response *bwr;
  123         struct aac_ccb *ac;
  124         struct aac_softc *aac;
  125         struct aac_blockread *br;
  126         struct aac_blockwrite *bw;
  127         struct aac_sg_entry *sge;
  128         struct aac_sg_table *sgt;
  129         struct aac_fib *fib;
  130         bus_dmamap_t xfer;
  131         u_int32_t status;
  132         u_int16_t size;
  133         int s, rv, i;
  134 
  135         aac = (struct aac_softc *)sc->sc_ld.sc_dv.dv_parent;
  136 
  137         /*
  138          * Allocate a command control block and map the data transfer.
  139          */
  140         ac = aac_ccb_alloc(aac, (dowrite ? AAC_CCB_DATA_OUT : AAC_CCB_DATA_IN));
  141         ac->ac_data = data;
  142         ac->ac_datalen = datasize;
  143 
  144         if ((rv = aac_ccb_map(aac, ac)) != 0) {
  145                 aac_ccb_free(aac, ac);
  146                 return (rv);
  147         }
  148 
  149         /*
  150          * Build the command.
  151          */
  152         fib = ac->ac_fib;
  153 
  154         fib->Header.XferState = htole32(AAC_FIBSTATE_HOSTOWNED |
  155             AAC_FIBSTATE_INITIALISED | AAC_FIBSTATE_FROMHOST |
  156             AAC_FIBSTATE_REXPECTED | AAC_FIBSTATE_NORM);
  157         fib->Header.Command = htole16(ContainerCommand);
  158 
  159         if (dowrite) {
  160                 bw = (struct aac_blockwrite *)&fib->data[0];
  161                 bw->Command = htole32(VM_CtBlockWrite);
  162                 bw->ContainerId = htole32(sc->sc_hwunit);
  163                 bw->BlockNumber = htole32(blkno);
  164                 bw->ByteCount = htole32(datasize);
  165                 bw->Stable = htole32(CUNSTABLE); /* XXX what's appropriate here? */
  166 
  167                 size = sizeof(struct aac_blockwrite);
  168                 sgt = &bw->SgMap;
  169         } else {
  170                 br = (struct aac_blockread *)&fib->data[0];
  171                 br->Command = htole32(VM_CtBlockRead);
  172                 br->ContainerId = htole32(sc->sc_hwunit);
  173                 br->BlockNumber = htole32(blkno);
  174                 br->ByteCount = htole32(datasize);
  175 
  176                 size = sizeof(struct aac_blockread);
  177                 sgt = &br->SgMap;
  178         }
  179 
  180         xfer = ac->ac_dmamap_xfer;
  181         sgt->SgCount = xfer->dm_nsegs;
  182         sge = sgt->SgEntry;
  183 
  184         for (i = 0; i < xfer->dm_nsegs; i++, sge++) {
  185                 sge->SgAddress = htole32(xfer->dm_segs[i].ds_addr);
  186                 sge->SgByteCount = htole32(xfer->dm_segs[i].ds_len);
  187                 AAC_DPRINTF(AAC_D_IO,
  188                     ("#%d va %p pa %lx len %x\n", i, data,
  189                     (u_long)xfer->dm_segs[i].ds_addr,
  190                     xfer->dm_segs[i].ds_len));
  191         }
  192 
  193         size += xfer->dm_nsegs * sizeof(struct aac_sg_entry);
  194         size = htole16(sizeof(fib->Header) + size);
  195         fib->Header.Size = htole16(size);
  196 
  197         if (bp == NULL) {
  198                 /*
  199                  * Polled commands must not sit on the software queue.  Wait
  200                  * up to 30 seconds for the command to complete.
  201                  */
  202                 s = splbio();
  203                 rv = aac_ccb_poll(aac, ac, 30000);
  204                 aac_ccb_unmap(aac, ac);
  205                 aac_ccb_free(aac, ac);
  206                 splx(s);
  207 
  208                 if (rv == 0) {
  209                         if (dowrite) {
  210                                 bwr = (struct aac_blockwrite_response *)
  211                                     &ac->ac_fib->data[0];
  212                                 status = le32toh(bwr->Status);
  213                         } else {
  214                                 brr = (struct aac_blockread_response *)
  215                                     &ac->ac_fib->data[0];
  216                                 status = le32toh(brr->Status);
  217                         }
  218 
  219                         if (status != ST_OK) {
  220                                 printf("%s: I/O error: %s\n",
  221                                     sc->sc_ld.sc_dv.dv_xname,
  222                                     aac_describe_code(aac_command_status_table,
  223                                     status));
  224                                 rv = EIO;
  225                         }
  226                 }
  227         } else {
  228                 ac->ac_device = (struct device *)sc;
  229                 ac->ac_context = bp;
  230                 ac->ac_intr = ld_aac_intr;
  231                 aac_ccb_enqueue(aac, ac);
  232                 rv = 0;
  233         }
  234 
  235         return (rv);
  236 }
  237 
  238 static int
  239 ld_aac_start(struct ld_softc *ld, struct buf *bp)
  240 {
  241 
  242         return (ld_aac_dobio((struct ld_aac_softc *)ld, bp->b_data,
  243             bp->b_bcount, bp->b_rawblkno, (bp->b_flags & B_READ) == 0, bp));
  244 }
  245 
  246 static void
  247 ld_aac_intr(struct aac_ccb *ac)
  248 {
  249         struct aac_blockread_response *brr;
  250         struct aac_blockwrite_response *bwr;
  251         struct ld_aac_softc *sc;
  252         struct aac_softc *aac;
  253         struct buf *bp;
  254         u_int32_t status;
  255 
  256         bp = ac->ac_context;
  257         sc = (struct ld_aac_softc *)ac->ac_device;
  258         aac = (struct aac_softc *)sc->sc_ld.sc_dv.dv_parent;
  259 
  260         if ((bp->b_flags & B_READ) != 0) {
  261                 brr = (struct aac_blockread_response *)&ac->ac_fib->data[0];
  262                 status = le32toh(brr->Status);
  263         } else {
  264                 bwr = (struct aac_blockwrite_response *)&ac->ac_fib->data[0];
  265                 status = le32toh(bwr->Status);
  266         }
  267 
  268         aac_ccb_unmap(aac, ac);
  269         aac_ccb_free(aac, ac);
  270 
  271         if (status != ST_OK) {
  272                 bp->b_flags |= B_ERROR;
  273                 bp->b_error = EIO;
  274                 bp->b_resid = bp->b_bcount;
  275 
  276                 printf("%s: I/O error: %s\n", sc->sc_ld.sc_dv.dv_xname,
  277                     aac_describe_code(aac_command_status_table, status));
  278         } else
  279                 bp->b_resid = 0;
  280 
  281         lddone(&sc->sc_ld, bp);
  282 }
  283 
  284 static int
  285 ld_aac_dump(struct ld_softc *ld, void *data, int blkno, int blkcnt)
  286 {
  287 
  288         return (ld_aac_dobio((struct ld_aac_softc *)ld, data,
  289             blkcnt * ld->sc_secsize, blkno, 1, NULL));
  290 }

Cache object: af896cb2ef4c88d4e1ee9f9fb8a13ad8


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.