ld_aac.c

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    1 /*      $NetBSD: ld_aac.c,v 1.22 2008/10/02 08:21:57 sborrill 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  *
   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 #include <sys/cdefs.h>
   33 __KERNEL_RCSID(0, "$NetBSD: ld_aac.c,v 1.22 2008/10/02 08:21:57 sborrill Exp $");
   34 
   35 #include "rnd.h"
   36 
   37 #include <sys/param.h>
   38 #include <sys/systm.h>
   39 #include <sys/kernel.h>
   40 #include <sys/device.h>
   41 #include <sys/buf.h>
   42 #include <sys/bufq.h>
   43 #include <sys/endian.h>
   44 #include <sys/dkio.h>
   45 #include <sys/disk.h>
   46 #if NRND > 0
   47 #include <sys/rnd.h>
   48 #endif
   49 
   50 #include <sys/bus.h>
   51 
   52 #include <uvm/uvm_extern.h>
   53 
   54 #include <dev/ldvar.h>
   55 
   56 #include <dev/ic/aacreg.h>
   57 #include <dev/ic/aacvar.h>
   58 
   59 struct ld_aac_softc {
   60         struct  ld_softc sc_ld;
   61         int     sc_hwunit;
   62 };
   63 
   64 static void     ld_aac_attach(device_t, device_t, void *);
   65 static void     ld_aac_intr(struct aac_ccb *);
   66 static int      ld_aac_dobio(struct ld_aac_softc *, void *, int, daddr_t, int,
   67                              struct buf *);
   68 static int      ld_aac_dump(struct ld_softc *, void *, int, int);
   69 static int      ld_aac_match(device_t, cfdata_t, void *);
   70 static int      ld_aac_start(struct ld_softc *, struct buf *);
   71 
   72 CFATTACH_DECL_NEW(ld_aac, sizeof(struct ld_aac_softc),
   73     ld_aac_match, ld_aac_attach, NULL, NULL);
   74 
   75 static int
   76 ld_aac_match(device_t parent, cfdata_t match, void *aux)
   77 {
   78 
   79         return (1);
   80 }
   81 
   82 static void
   83 ld_aac_attach(device_t parent, device_t self, void *aux)
   84 {
   85         struct aac_attach_args *aaca = aux;
   86         struct ld_aac_softc *sc = device_private(self);
   87         struct ld_softc *ld = &sc->sc_ld;
   88         struct aac_softc *aac = device_private(parent);
   89         struct aac_drive *hdr = &aac->sc_hdr[aaca->aaca_unit];
   90 
   91         ld->sc_dv = self;
   92 
   93         sc->sc_hwunit = aaca->aaca_unit;
   94         ld->sc_flags = LDF_ENABLED;
   95         ld->sc_maxxfer = AAC_MAX_XFER(aac);
   96         ld->sc_secperunit = hdr->hd_size;
   97         ld->sc_secsize = AAC_SECTOR_SIZE;
   98         ld->sc_maxqueuecnt =
   99             (aac->sc_max_fibs - AAC_NCCBS_RESERVE) / aac->sc_nunits;
  100         ld->sc_start = ld_aac_start;
  101         ld->sc_dump = ld_aac_dump;
  102 
  103         aprint_normal(": %s\n",
  104             aac_describe_code(aac_container_types, hdr->hd_devtype));
  105         ldattach(ld);
  106 }
  107 
  108 static int
  109 ld_aac_dobio(struct ld_aac_softc *sc, void *data, int datasize, daddr_t blkno,
  110              int dowrite, struct buf *bp)
  111 {
  112         struct aac_blockread_response *brr;
  113         struct aac_blockwrite_response *bwr;
  114         struct aac_ccb *ac;
  115         struct aac_softc *aac;
  116         struct aac_fib *fib;
  117         bus_dmamap_t xfer;
  118         u_int32_t status;
  119         u_int16_t size;
  120         int s, rv, i;
  121 
  122         aac = device_private(device_parent(sc->sc_ld.sc_dv));
  123 
  124         /*
  125          * Allocate a command control block and map the data transfer.
  126          */
  127         ac = aac_ccb_alloc(aac, (dowrite ? AAC_CCB_DATA_OUT : AAC_CCB_DATA_IN));
  128         if (ac == NULL)
  129                 return EBUSY;
  130         ac->ac_data = data;
  131         ac->ac_datalen = datasize;
  132 
  133         if ((rv = aac_ccb_map(aac, ac)) != 0) {
  134                 aac_ccb_free(aac, ac);
  135                 return (rv);
  136         }
  137 
  138         /*
  139          * Build the command.
  140          */
  141         fib = ac->ac_fib;
  142 
  143         fib->Header.XferState = htole32(AAC_FIBSTATE_HOSTOWNED |
  144             AAC_FIBSTATE_INITIALISED | AAC_FIBSTATE_FROMHOST |
  145             AAC_FIBSTATE_REXPECTED | AAC_FIBSTATE_NORM |
  146             AAC_FIBSTATE_ASYNC | AAC_FIBSTATE_FAST_RESPONSE );
  147 
  148         if (aac->sc_quirks & AAC_QUIRK_RAW_IO) {
  149                 struct aac_raw_io *raw;
  150                 struct aac_sg_entryraw *sge;
  151                 struct aac_sg_tableraw *sgt;
  152 
  153                 raw = (struct aac_raw_io *)&fib->data[0];
  154                 fib->Header.Command = htole16(RawIo);
  155                 raw->BlockNumber = htole64(blkno);
  156                 raw->ByteCount = htole32(datasize);
  157                 raw->ContainerId = htole16(sc->sc_hwunit);
  158                 raw->BpTotal = 0;
  159                 raw->BpComplete = 0;
  160                 size = sizeof(struct aac_raw_io);
  161                 sgt = &raw->SgMapRaw;
  162                 raw->Flags = (dowrite ? 0 : 1);
  163 
  164                 xfer = ac->ac_dmamap_xfer;
  165                 sgt->SgCount = xfer->dm_nsegs;
  166                 sge = sgt->SgEntryRaw;
  167 
  168                 for (i = 0; i < xfer->dm_nsegs; i++, sge++) {
  169                         sge->SgAddress = htole64(xfer->dm_segs[i].ds_addr);
  170                         sge->SgByteCount = htole32(xfer->dm_segs[i].ds_len);
  171                         sge->Next = 0;
  172                         sge->Prev = 0;
  173                         sge->Flags = 0;
  174                 }
  175                 size += xfer->dm_nsegs * sizeof(struct aac_sg_entryraw);
  176                 size = sizeof(fib->Header) + size;
  177                 fib->Header.Size = htole16(size);
  178         } else if ((aac->sc_quirks & AAC_QUIRK_SG_64BIT) == 0) {
  179                 struct aac_blockread *br;
  180                 struct aac_blockwrite *bw;
  181                 struct aac_sg_entry *sge;
  182                 struct aac_sg_table *sgt;
  183 
  184                 fib->Header.Command = htole16(ContainerCommand);
  185                 if (dowrite) {
  186                         bw = (struct aac_blockwrite *)&fib->data[0];
  187                         bw->Command = htole32(VM_CtBlockWrite);
  188                         bw->ContainerId = htole32(sc->sc_hwunit);
  189                         bw->BlockNumber = htole32(blkno);
  190                         bw->ByteCount = htole32(datasize);
  191                         bw->Stable = htole32(CUNSTABLE);
  192                         /* CSTABLE sometimes?  FUA? */
  193 
  194                         size = sizeof(struct aac_blockwrite);
  195                         sgt = &bw->SgMap;
  196                 } else {
  197                         br = (struct aac_blockread *)&fib->data[0];
  198                         br->Command = htole32(VM_CtBlockRead);
  199                         br->ContainerId = htole32(sc->sc_hwunit);
  200                         br->BlockNumber = htole32(blkno);
  201                         br->ByteCount = htole32(datasize);
  202 
  203                         size = sizeof(struct aac_blockread);
  204                         sgt = &br->SgMap;
  205                 }
  206 
  207                 xfer = ac->ac_dmamap_xfer;
  208                 sgt->SgCount = xfer->dm_nsegs;
  209                 sge = sgt->SgEntry;
  210 
  211                 for (i = 0; i < xfer->dm_nsegs; i++, sge++) {
  212                         sge->SgAddress = htole32(xfer->dm_segs[i].ds_addr);
  213                         sge->SgByteCount = htole32(xfer->dm_segs[i].ds_len);
  214                         AAC_DPRINTF(AAC_D_IO,
  215                             ("#%d va %p pa %lx len %lx\n", i, data,
  216                             (u_long)xfer->dm_segs[i].ds_addr,
  217                             (u_long)xfer->dm_segs[i].ds_len));
  218                 }
  219 
  220                 size += xfer->dm_nsegs * sizeof(struct aac_sg_entry);
  221                 size = sizeof(fib->Header) + size;
  222                 fib->Header.Size = htole16(size);
  223         } else {
  224                 struct aac_blockread64 *br;
  225                 struct aac_blockwrite64 *bw;
  226                 struct aac_sg_entry64 *sge;
  227                 struct aac_sg_table64 *sgt;
  228 
  229                 fib->Header.Command = htole16(ContainerCommand64);
  230                 if (dowrite) {
  231                         bw = (struct aac_blockwrite64 *)&fib->data[0];
  232                         bw->Command = htole32(VM_CtHostWrite64);
  233                         bw->BlockNumber = htole32(blkno);
  234                         bw->ContainerId = htole16(sc->sc_hwunit);
  235                         bw->SectorCount = htole16(datasize / AAC_BLOCK_SIZE);
  236                         bw->Pad = 0;
  237                         bw->Flags = 0;
  238 
  239                         size = sizeof(struct aac_blockwrite64);
  240                         sgt = &bw->SgMap64;
  241                 } else {
  242                         br = (struct aac_blockread64 *)&fib->data[0];
  243                         br->Command = htole32(VM_CtHostRead64);
  244                         br->BlockNumber = htole32(blkno);
  245                         br->ContainerId = htole16(sc->sc_hwunit);
  246                         br->SectorCount = htole16(datasize / AAC_BLOCK_SIZE);
  247                         br->Pad = 0;
  248                         br->Flags = 0;
  249 
  250                         size = sizeof(struct aac_blockread64);
  251                         sgt = &br->SgMap64;
  252                 }
  253 
  254                 xfer = ac->ac_dmamap_xfer;
  255                 sgt->SgCount = xfer->dm_nsegs;
  256                 sge = sgt->SgEntry64;
  257 
  258                 for (i = 0; i < xfer->dm_nsegs; i++, sge++) {
  259                         /*
  260                          * XXX - This is probably an alignment issue on non-x86
  261                          * platforms since this is a packed array of 64/32-bit
  262                          * tuples, so every other SgAddress is 32-bit, but not
  263                          * 64-bit aligned.
  264                          */
  265                         sge->SgAddress = htole64(xfer->dm_segs[i].ds_addr);
  266                         sge->SgByteCount = htole32(xfer->dm_segs[i].ds_len);
  267                         AAC_DPRINTF(AAC_D_IO,
  268                             ("#%d va %p pa %llx len %lx\n", i, data,
  269                             (u_int64_t)xfer->dm_segs[i].ds_addr,
  270                             (u_long)xfer->dm_segs[i].ds_len));
  271                 }
  272                 size += xfer->dm_nsegs * sizeof(struct aac_sg_entry64);
  273                 size = sizeof(fib->Header) + size;
  274                 fib->Header.Size = htole16(size);
  275         }
  276 
  277         if (bp == NULL) {
  278                 /*
  279                  * Polled commands must not sit on the software queue.  Wait
  280                  * up to 30 seconds for the command to complete.
  281                  */
  282                 s = splbio();
  283                 rv = aac_ccb_poll(aac, ac, 30000);
  284                 aac_ccb_unmap(aac, ac);
  285                 aac_ccb_free(aac, ac);
  286                 splx(s);
  287 
  288                 if (rv == 0) {
  289                         if (dowrite) {
  290                                 bwr = (struct aac_blockwrite_response *)
  291                                     &ac->ac_fib->data[0];
  292                                 status = le32toh(bwr->Status);
  293                         } else {
  294                                 brr = (struct aac_blockread_response *)
  295                                     &ac->ac_fib->data[0];
  296                                 status = le32toh(brr->Status);
  297                         }
  298 
  299                         if (status != ST_OK) {
  300                                 aprint_error_dev(sc->sc_ld.sc_dv,
  301                                     "I/O error: %s\n",
  302                                     aac_describe_code(aac_command_status_table,
  303                                     status));
  304                                 rv = EIO;
  305                         }
  306                 }
  307         } else {
  308                 ac->ac_device = (struct device *)sc;
  309                 ac->ac_context = bp;
  310                 ac->ac_intr = ld_aac_intr;
  311                 aac_ccb_enqueue(aac, ac);
  312                 rv = 0;
  313         }
  314 
  315         return (rv);
  316 }
  317 
  318 static int
  319 ld_aac_start(struct ld_softc *ld, struct buf *bp)
  320 {
  321 
  322         return (ld_aac_dobio((struct ld_aac_softc *)ld, bp->b_data,
  323             bp->b_bcount, bp->b_rawblkno, (bp->b_flags & B_READ) == 0, bp));
  324 }
  325 
  326 static void
  327 ld_aac_intr(struct aac_ccb *ac)
  328 {
  329         struct aac_blockread_response *brr;
  330         struct aac_blockwrite_response *bwr;
  331         struct ld_aac_softc *sc;
  332         struct aac_softc *aac;
  333         struct buf *bp;
  334         u_int32_t status;
  335 
  336         bp = ac->ac_context;
  337         sc = (struct ld_aac_softc *)ac->ac_device;
  338         aac = device_private(device_parent(sc->sc_ld.sc_dv));
  339 
  340         if ((bp->b_flags & B_READ) != 0) {
  341                 brr = (struct aac_blockread_response *)&ac->ac_fib->data[0];
  342                 status = le32toh(brr->Status);
  343         } else {
  344                 bwr = (struct aac_blockwrite_response *)&ac->ac_fib->data[0];
  345                 status = le32toh(bwr->Status);
  346         }
  347 
  348         aac_ccb_unmap(aac, ac);
  349         aac_ccb_free(aac, ac);
  350 
  351         if (status != ST_OK) {
  352                 bp->b_error = EIO;
  353                 bp->b_resid = bp->b_bcount;
  354 
  355                 aprint_error_dev(sc->sc_ld.sc_dv, "I/O error: %s\n",
  356                     aac_describe_code(aac_command_status_table, status));
  357         } else
  358                 bp->b_resid = 0;
  359 
  360         lddone(&sc->sc_ld, bp);
  361 }
  362 
  363 static int
  364 ld_aac_dump(struct ld_softc *ld, void *data, int blkno, int blkcnt)
  365 {
  366 
  367         return (ld_aac_dobio((struct ld_aac_softc *)ld, data,
  368             blkcnt * ld->sc_secsize, blkno, 1, NULL));
  369 }
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FreeBSD/Linux Kernel Cross Reference sys/dev/ic/ld_aac.c

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