pdq_ifsubr.c

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    1 /*      $NetBSD: pdq_ifsubr.c,v 1.38 2001/12/21 23:21:47 matt Exp $     */
    2 
    3 /*-
    4  * Copyright (c) 1995, 1996 Matt Thomas <matt@3am-software.com>
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. The name of the author may not be used to endorse or promote products
   13  *    derived from this software without specific prior written permission
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   25  *
   26  * $NetBSD: pdq_ifsubr.c,v 1.12 1997/06/05 01:56:35 thomas Exp$
   27  * $FreeBSD: releng/5.0/sys/dev/pdq/pdq_ifsubr.c 106937 2002-11-14 23:54:55Z sam $
   28  */
   29 
   30 /*
   31  * DEC PDQ FDDI Controller; code for BSD derived operating systems
   32  *
   33  *      This module provide bus independent BSD specific O/S functions.
   34  *      (ie. it provides an ifnet interface to the rest of the system)
   35  */
   36 
   37 #ifdef __NetBSD__
   38 #include <sys/cdefs.h>
   39 __KERNEL_RCSID(0, "$NetBSD: pdq_ifsubr.c,v 1.38 2001/12/21 23:21:47 matt Exp $");
   40 #endif
   41 
   42 #define PDQ_OSSUPPORT
   43 
   44 #include <sys/param.h>
   45 #include <sys/systm.h>
   46 #include <sys/kernel.h>
   47 #include <sys/lock.h>
   48 #include <sys/mutex.h>
   49 #include <sys/malloc.h>
   50 #include <sys/socket.h>
   51 #include <sys/sockio.h>
   52 
   53 #include <sys/module.h>
   54 #include <sys/bus.h>
   55 
   56 #include <machine/bus_memio.h>
   57 #include <machine/bus_pio.h>
   58 #include <machine/bus.h>
   59 #include <machine/resource.h>
   60 #include <sys/rman.h> 
   61 
   62 #include <net/if.h>
   63 #include <net/if_arp.h>
   64 #include <net/if_dl.h>
   65 #include <net/if_media.h> 
   66 #include <net/fddi.h>
   67 
   68 #include <net/bpf.h>
   69 
   70 #include <dev/pdq/pdq_freebsd.h>
   71 #include <dev/pdq/pdqreg.h>
   72 
   73 devclass_t pdq_devclass;
   74 
   75 static void
   76 pdq_ifinit(
   77     pdq_softc_t *sc)
   78 {
   79     if (sc->sc_if.if_flags & IFF_UP) {
   80         sc->sc_if.if_flags |= IFF_RUNNING;
   81         if (sc->sc_if.if_flags & IFF_PROMISC) {
   82             sc->sc_pdq->pdq_flags |= PDQ_PROMISC;
   83         } else {
   84             sc->sc_pdq->pdq_flags &= ~PDQ_PROMISC;
   85         }
   86         if (sc->sc_if.if_flags & IFF_LINK1) {
   87             sc->sc_pdq->pdq_flags |= PDQ_PASS_SMT;
   88         } else {
   89             sc->sc_pdq->pdq_flags &= ~PDQ_PASS_SMT;
   90         }
   91         sc->sc_pdq->pdq_flags |= PDQ_RUNNING;
   92         pdq_run(sc->sc_pdq);
   93     } else {
   94         sc->sc_if.if_flags &= ~IFF_RUNNING;
   95         sc->sc_pdq->pdq_flags &= ~PDQ_RUNNING;
   96         pdq_stop(sc->sc_pdq);
   97     }
   98 }
   99 
  100 static void
  101 pdq_ifwatchdog(
  102     struct ifnet *ifp)
  103 {
  104     /*
  105      * No progress was made on the transmit queue for PDQ_OS_TX_TRANSMIT
  106      * seconds.  Remove all queued packets.
  107      */
  108 
  109     ifp->if_flags &= ~IFF_OACTIVE;
  110     ifp->if_timer = 0;
  111     for (;;) {
  112         struct mbuf *m;
  113         IFQ_DEQUEUE(&ifp->if_snd, m);
  114         if (m == NULL)
  115             return;
  116         PDQ_OS_DATABUF_FREE(PDQ_OS_IFP_TO_SOFTC(ifp)->sc_pdq, m);
  117     }
  118 }
  119 
  120 static void
  121 pdq_ifstart(
  122     struct ifnet *ifp)
  123 {
  124     pdq_softc_t * const sc = PDQ_OS_IFP_TO_SOFTC(ifp);
  125     struct mbuf *m;
  126     int tx = 0;
  127 
  128     if ((ifp->if_flags & IFF_RUNNING) == 0)
  129         return;
  130 
  131     if (sc->sc_if.if_timer == 0)
  132         sc->sc_if.if_timer = PDQ_OS_TX_TIMEOUT;
  133 
  134     if ((sc->sc_pdq->pdq_flags & PDQ_TXOK) == 0) {
  135         sc->sc_if.if_flags |= IFF_OACTIVE;
  136         return;
  137     }
  138     sc->sc_flags |= PDQIF_DOWNCALL;
  139     for (;; tx = 1) {
  140         IF_DEQUEUE(&ifp->if_snd, m);
  141         if (m == NULL)
  142             break;
  143 #if defined(PDQ_BUS_DMA) && !defined(PDQ_BUS_DMA_NOTX)
  144         if ((m->m_flags & M_HASTXDMAMAP) == 0) {
  145             bus_dmamap_t map;
  146             if (PDQ_OS_HDR_OFFSET != PDQ_RX_FC_OFFSET) {
  147                 m->m_data[0] = PDQ_FDDI_PH0;
  148                 m->m_data[1] = PDQ_FDDI_PH1;
  149                 m->m_data[2] = PDQ_FDDI_PH2;
  150             }
  151             if (!bus_dmamap_create(sc->sc_dmatag, m->m_pkthdr.len, 255,
  152                                    m->m_pkthdr.len, 0, BUS_DMA_NOWAIT, &map)) {
  153                 if (!bus_dmamap_load_mbuf(sc->sc_dmatag, map, m,
  154                                           BUS_DMA_WRITE|BUS_DMA_NOWAIT)) {
  155                     bus_dmamap_sync(sc->sc_dmatag, map, 0, m->m_pkthdr.len,
  156                                     BUS_DMASYNC_PREWRITE);
  157                     M_SETCTX(m, map);
  158                     m->m_flags |= M_HASTXDMAMAP;
  159                 }
  160             }
  161             if ((m->m_flags & M_HASTXDMAMAP) == 0)
  162                 break;
  163         }
  164 #else
  165         if (PDQ_OS_HDR_OFFSET != PDQ_RX_FC_OFFSET) {
  166             m->m_data[0] = PDQ_FDDI_PH0;
  167             m->m_data[1] = PDQ_FDDI_PH1;
  168             m->m_data[2] = PDQ_FDDI_PH2;
  169         }
  170 #endif
  171 
  172         if (pdq_queue_transmit_data(sc->sc_pdq, m) == PDQ_FALSE)
  173             break;
  174     }
  175     if (m != NULL) {
  176         ifp->if_flags |= IFF_OACTIVE;
  177         IF_PREPEND(&ifp->if_snd, m);
  178     }
  179     if (tx)
  180         PDQ_DO_TYPE2_PRODUCER(sc->sc_pdq);
  181     sc->sc_flags &= ~PDQIF_DOWNCALL;
  182 }
  183 
  184 void
  185 pdq_os_receive_pdu(
  186     pdq_t *pdq,
  187     struct mbuf *m,
  188     size_t pktlen,
  189     int drop)
  190 {
  191     pdq_softc_t *sc = pdq->pdq_os_ctx;
  192     struct ifnet *ifp = &sc->sc_if;
  193     struct fddi_header *fh;
  194 
  195     ifp->if_ipackets++;
  196 #if defined(PDQ_BUS_DMA)
  197     {
  198         /*
  199          * Even though the first mbuf start at the first fddi header octet,
  200          * the dmamap starts PDQ_OS_HDR_OFFSET octets earlier.  Any additional
  201          * mbufs will start normally.
  202          */
  203         int offset = PDQ_OS_HDR_OFFSET;
  204         struct mbuf *m0;
  205         for (m0 = m; m0 != NULL; m0 = m0->m_next, offset = 0) {
  206             pdq_os_databuf_sync(sc, m0, offset, m0->m_len, BUS_DMASYNC_POSTREAD);
  207             bus_dmamap_unload(sc->sc_dmatag, M_GETCTX(m0, bus_dmamap_t));
  208             bus_dmamap_destroy(sc->sc_dmatag, M_GETCTX(m0, bus_dmamap_t));
  209             m0->m_flags &= ~M_HASRXDMAMAP;
  210             M_SETCTX(m0, NULL);
  211         }
  212     }
  213 #endif
  214     m->m_pkthdr.len = pktlen;
  215 #if NBPFILTER > 0
  216     if (sc->sc_bpf != NULL)
  217         PDQ_BPF_MTAP(sc, m);
  218 #endif
  219     fh = mtod(m, struct fddi_header *);
  220     if (drop || (fh->fddi_fc & (FDDIFC_L|FDDIFC_F)) != FDDIFC_LLC_ASYNC) {
  221         ifp->if_iqdrops++;
  222         ifp->if_ierrors++;
  223         PDQ_OS_DATABUF_FREE(pdq, m);
  224         return;
  225     }
  226 
  227     m->m_pkthdr.rcvif = ifp;
  228     (*ifp->if_input)(ifp, m);
  229 }
  230 
  231 void
  232 pdq_os_restart_transmitter(
  233     pdq_t *pdq)
  234 {
  235     pdq_softc_t *sc = pdq->pdq_os_ctx;
  236     sc->sc_if.if_flags &= ~IFF_OACTIVE;
  237     if (IFQ_IS_EMPTY(&sc->sc_if.if_snd) == 0) {
  238         sc->sc_if.if_timer = PDQ_OS_TX_TIMEOUT;
  239         if ((sc->sc_flags & PDQIF_DOWNCALL) == 0)
  240             pdq_ifstart(&sc->sc_if);
  241     } else {
  242         sc->sc_if.if_timer = 0;
  243     }
  244 }
  245 
  246 void
  247 pdq_os_transmit_done(
  248     pdq_t *pdq,
  249     struct mbuf *m)
  250 {
  251     pdq_softc_t *sc = pdq->pdq_os_ctx;
  252 #if NBPFILTER > 0
  253     if (sc->sc_bpf != NULL)
  254         PDQ_BPF_MTAP(sc, m);
  255 #endif
  256     PDQ_OS_DATABUF_FREE(pdq, m);
  257     sc->sc_if.if_opackets++;
  258 }
  259 
  260 void
  261 pdq_os_addr_fill(
  262     pdq_t *pdq,
  263     pdq_lanaddr_t *addr,
  264     size_t num_addrs)
  265 {
  266     pdq_softc_t *sc = pdq->pdq_os_ctx;
  267     struct ifnet *ifp;
  268     struct ifmultiaddr *ifma;
  269 
  270     ifp = &sc->arpcom.ac_if;
  271 
  272     /*
  273      * ADDR_FILTER_SET is always issued before FILTER_SET so
  274      * we can play with PDQ_ALLMULTI and not worry about 
  275      * queueing a FILTER_SET ourselves.
  276      */
  277 
  278     pdq->pdq_flags &= ~PDQ_ALLMULTI;
  279 #if defined(IFF_ALLMULTI)
  280     sc->sc_if.if_flags &= ~IFF_ALLMULTI;
  281 #endif
  282 
  283     for (ifma = TAILQ_FIRST(&sc->sc_if.if_multiaddrs); ifma && num_addrs > 0;
  284          ifma = TAILQ_NEXT(ifma, ifma_link)) {
  285             char *mcaddr;
  286             if (ifma->ifma_addr->sa_family != AF_LINK)
  287                     continue;
  288             mcaddr = LLADDR((struct sockaddr_dl *)ifma->ifma_addr);
  289             ((u_short *) addr->lanaddr_bytes)[0] = ((u_short *) mcaddr)[0];
  290             ((u_short *) addr->lanaddr_bytes)[1] = ((u_short *) mcaddr)[1];
  291             ((u_short *) addr->lanaddr_bytes)[2] = ((u_short *) mcaddr)[2];
  292             addr++;
  293             num_addrs--;
  294     }
  295     /*
  296      * If not all the address fit into the CAM, turn on all-multicast mode.
  297      */
  298     if (ifma != NULL) {
  299         pdq->pdq_flags |= PDQ_ALLMULTI;
  300 #if defined(IFF_ALLMULTI)
  301         sc->sc_if.if_flags |= IFF_ALLMULTI;
  302 #endif
  303     }
  304 }
  305 
  306 #if defined(IFM_FDDI)
  307 static int
  308 pdq_ifmedia_change(
  309     struct ifnet *ifp)
  310 {
  311     pdq_softc_t * const sc = PDQ_OS_IFP_TO_SOFTC(ifp);
  312 
  313     if (sc->sc_ifmedia.ifm_media & IFM_FDX) {
  314         if ((sc->sc_pdq->pdq_flags & PDQ_WANT_FDX) == 0) {
  315             sc->sc_pdq->pdq_flags |= PDQ_WANT_FDX;
  316             if (sc->sc_pdq->pdq_flags & PDQ_RUNNING)
  317                 pdq_run(sc->sc_pdq);
  318         }
  319     } else if (sc->sc_pdq->pdq_flags & PDQ_WANT_FDX) {
  320         sc->sc_pdq->pdq_flags &= ~PDQ_WANT_FDX;
  321         if (sc->sc_pdq->pdq_flags & PDQ_RUNNING)
  322             pdq_run(sc->sc_pdq);
  323     }
  324 
  325     return 0;
  326 }
  327 
  328 static void
  329 pdq_ifmedia_status(
  330     struct ifnet *ifp,
  331     struct ifmediareq *ifmr)
  332 {
  333     pdq_softc_t * const sc = PDQ_OS_IFP_TO_SOFTC(ifp);
  334 
  335     ifmr->ifm_status = IFM_AVALID;
  336     if (sc->sc_pdq->pdq_flags & PDQ_IS_ONRING)
  337         ifmr->ifm_status |= IFM_ACTIVE;
  338 
  339     ifmr->ifm_active = (ifmr->ifm_current & ~IFM_FDX);
  340     if (sc->sc_pdq->pdq_flags & PDQ_IS_FDX)
  341         ifmr->ifm_active |= IFM_FDX;
  342 }
  343 
  344 void
  345 pdq_os_update_status(
  346     pdq_t *pdq,
  347     const void *arg)
  348 {
  349     pdq_softc_t * const sc = pdq->pdq_os_ctx;
  350     const pdq_response_status_chars_get_t *rsp = arg;
  351     int media = 0;
  352 
  353     switch (rsp->status_chars_get.pmd_type[0]) {
  354         case PDQ_PMD_TYPE_ANSI_MUTLI_MODE:         media = IFM_FDDI_MMF; break;
  355         case PDQ_PMD_TYPE_ANSI_SINGLE_MODE_TYPE_1: media = IFM_FDDI_SMF; break;
  356         case PDQ_PMD_TYPE_ANSI_SIGNLE_MODE_TYPE_2: media = IFM_FDDI_SMF; break;
  357         case PDQ_PMD_TYPE_UNSHIELDED_TWISTED_PAIR: media = IFM_FDDI_UTP; break;
  358         default: media |= IFM_MANUAL;
  359     }
  360 
  361     if (rsp->status_chars_get.station_type == PDQ_STATION_TYPE_DAS)
  362         media |= IFM_FDDI_DA;
  363 
  364     sc->sc_ifmedia.ifm_media = media | IFM_FDDI;
  365 }
  366 #endif /* defined(IFM_FDDI) */
  367 
  368 static int
  369 pdq_ifioctl(
  370     struct ifnet *ifp,
  371     u_long cmd,
  372     caddr_t data)
  373 {
  374     pdq_softc_t *sc = PDQ_OS_IFP_TO_SOFTC(ifp);
  375     int error = 0;
  376 
  377     PDQ_LOCK(sc);
  378 
  379     switch (cmd) {
  380         case SIOCSIFMTU:
  381         case SIOCGIFADDR:
  382         case SIOCSIFADDR: {
  383             error = fddi_ioctl(ifp, cmd, data);
  384             break;
  385         }
  386 
  387         case SIOCSIFFLAGS: {
  388             pdq_ifinit(sc);
  389             break;
  390         }
  391 
  392         case SIOCADDMULTI:
  393         case SIOCDELMULTI: {
  394             if (sc->sc_if.if_flags & IFF_RUNNING) {
  395                     pdq_run(sc->sc_pdq);
  396                 error = 0;
  397             }
  398             break;
  399         }
  400 
  401 #if defined(IFM_FDDI) && defined(SIOCSIFMEDIA)
  402         case SIOCSIFMEDIA:
  403         case SIOCGIFMEDIA: {
  404             struct ifreq *ifr = (struct ifreq *)data;
  405             error = ifmedia_ioctl(ifp, ifr, &sc->sc_ifmedia, cmd);
  406             break;
  407         }
  408 #endif
  409 
  410         default: {
  411             error = EINVAL;
  412             break;
  413         }
  414     }
  415 
  416     PDQ_UNLOCK(sc);
  417     return error;
  418 }
  419 
  420 #ifndef IFF_NOTRAILERS
  421 #define IFF_NOTRAILERS  0
  422 #endif
  423 
  424 void
  425 pdq_ifattach(pdq_softc_t *sc)
  426 {
  427     struct ifnet *ifp = &sc->sc_if;
  428 
  429     mtx_init(&sc->mtx, device_get_nameunit(sc->dev), MTX_NETWORK_LOCK,
  430         MTX_DEF | MTX_RECURSE);
  431 
  432     ifp->if_softc = sc;
  433     ifp->if_init = (if_init_f_t *)pdq_ifinit;
  434     ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
  435     ifp->if_flags = IFF_BROADCAST|IFF_SIMPLEX|IFF_NOTRAILERS|IFF_MULTICAST;
  436 
  437 #if (defined(__FreeBSD__) && BSD >= 199506) || defined(__NetBSD__)
  438     ifp->if_watchdog = pdq_ifwatchdog;
  439 #else
  440     ifp->if_watchdog = ifwatchdog;
  441 #endif
  442 
  443     ifp->if_ioctl = pdq_ifioctl;
  444 #if !defined(__NetBSD__) && !defined(__FreeBSD__)
  445     ifp->if_output = fddi_output;
  446 #endif
  447     ifp->if_start = pdq_ifstart;
  448 
  449 #if defined(IFM_FDDI)
  450     {
  451         const int media = sc->sc_ifmedia.ifm_media;
  452         ifmedia_init(&sc->sc_ifmedia, IFM_FDX,
  453                      pdq_ifmedia_change, pdq_ifmedia_status);
  454         ifmedia_add(&sc->sc_ifmedia, media, 0, 0);
  455         ifmedia_set(&sc->sc_ifmedia, media);
  456     }
  457 #endif
  458   
  459     if_attach(ifp);
  460 #if defined(__NetBSD__)
  461     fddi_ifattach(ifp, (caddr_t)&sc->sc_pdq->pdq_hwaddr);
  462 #else
  463     fddi_ifattach(ifp, FDDI_BPF_SUPPORTED);
  464 #endif
  465 }
  466 
  467 void
  468 pdq_ifdetach (pdq_softc_t *sc)
  469 {
  470     struct ifnet *ifp;
  471 
  472     ifp = &sc->arpcom.ac_if;
  473 
  474     fddi_ifdetach(ifp, FDDI_BPF_SUPPORTED);
  475     pdq_stop(sc->sc_pdq);
  476     pdq_free(sc->dev);
  477 
  478     return;
  479 }
  480 
  481 void
  482 pdq_free (device_t dev)
  483 {
  484         pdq_softc_t *sc;
  485 
  486         sc = device_get_softc(dev);
  487 
  488         if (sc->io)
  489                 bus_release_resource(dev, sc->io_type, sc->io_rid, sc->io);
  490         if (sc->mem)
  491                 bus_release_resource(dev, sc->mem_type, sc->mem_rid, sc->mem);
  492         if (sc->irq_ih)
  493                 bus_teardown_intr(dev, sc->irq, sc->irq_ih);
  494         if (sc->irq)
  495                 bus_release_resource(dev, SYS_RES_IRQ, sc->irq_rid, sc->irq);
  496 
  497         /*
  498          * Destroy the mutex.
  499          */
  500         if (mtx_initialized(&sc->mtx) != 0) {
  501                 mtx_destroy(&sc->mtx);
  502         }
  503 
  504         return;
  505 }
  506 
  507 #if defined(PDQ_BUS_DMA) 
  508 int
  509 pdq_os_memalloc_contig(
  510     pdq_t *pdq)
  511 {
  512     pdq_softc_t * const sc = pdq->pdq_os_ctx;
  513     bus_dma_segment_t db_segs[1], ui_segs[1], cb_segs[1];
  514     int db_nsegs = 0, ui_nsegs = 0;
  515     int steps = 0;
  516     int not_ok;
  517 
  518     not_ok = bus_dmamem_alloc(sc->sc_dmatag,
  519                          sizeof(*pdq->pdq_dbp), sizeof(*pdq->pdq_dbp),
  520                          sizeof(*pdq->pdq_dbp), db_segs, 1, &db_nsegs,
  521                          BUS_DMA_NOWAIT);
  522     if (!not_ok) {
  523         steps = 1;
  524         not_ok = bus_dmamem_map(sc->sc_dmatag, db_segs, db_nsegs,
  525                                 sizeof(*pdq->pdq_dbp), (caddr_t *) &pdq->pdq_dbp,
  526                                 BUS_DMA_NOWAIT);
  527     }
  528     if (!not_ok) {
  529         steps = 2;
  530         not_ok = bus_dmamap_create(sc->sc_dmatag, db_segs[0].ds_len, 1,
  531                                    0x2000, 0, BUS_DMA_NOWAIT, &sc->sc_dbmap);
  532     }
  533     if (!not_ok) {
  534         steps = 3;
  535         not_ok = bus_dmamap_load(sc->sc_dmatag, sc->sc_dbmap,
  536                                  pdq->pdq_dbp, sizeof(*pdq->pdq_dbp),
  537                                  NULL, BUS_DMA_NOWAIT);
  538     }
  539     if (!not_ok) {
  540         steps = 4;
  541         pdq->pdq_pa_descriptor_block = sc->sc_dbmap->dm_segs[0].ds_addr;
  542         not_ok = bus_dmamem_alloc(sc->sc_dmatag,
  543                          PDQ_OS_PAGESIZE, PDQ_OS_PAGESIZE, PDQ_OS_PAGESIZE,
  544                          ui_segs, 1, &ui_nsegs, BUS_DMA_NOWAIT);
  545     }
  546     if (!not_ok) {
  547         steps = 5;
  548         not_ok = bus_dmamem_map(sc->sc_dmatag, ui_segs, ui_nsegs,
  549                             PDQ_OS_PAGESIZE,
  550                             (caddr_t *) &pdq->pdq_unsolicited_info.ui_events,
  551                             BUS_DMA_NOWAIT);
  552     }
  553     if (!not_ok) {
  554         steps = 6;
  555         not_ok = bus_dmamap_create(sc->sc_dmatag, ui_segs[0].ds_len, 1,
  556                                    PDQ_OS_PAGESIZE, 0, BUS_DMA_NOWAIT,
  557                                    &sc->sc_uimap);
  558     }
  559     if (!not_ok) {
  560         steps = 7;
  561         not_ok = bus_dmamap_load(sc->sc_dmatag, sc->sc_uimap,
  562                                  pdq->pdq_unsolicited_info.ui_events,
  563                                  PDQ_OS_PAGESIZE, NULL, BUS_DMA_NOWAIT);
  564     }
  565     if (!not_ok) {
  566         steps = 8;
  567         pdq->pdq_unsolicited_info.ui_pa_bufstart = sc->sc_uimap->dm_segs[0].ds_addr;
  568         cb_segs[0] = db_segs[0];
  569         cb_segs[0].ds_addr += offsetof(pdq_descriptor_block_t, pdqdb_consumer);
  570         cb_segs[0].ds_len = sizeof(pdq_consumer_block_t);
  571         not_ok = bus_dmamem_map(sc->sc_dmatag, cb_segs, 1,
  572                                 sizeof(*pdq->pdq_cbp), (caddr_t *) &pdq->pdq_cbp,
  573                                 BUS_DMA_NOWAIT|BUS_DMA_COHERENT);
  574     }
  575     if (!not_ok) {
  576         steps = 9;
  577         not_ok = bus_dmamap_create(sc->sc_dmatag, cb_segs[0].ds_len, 1,
  578                                    0x2000, 0, BUS_DMA_NOWAIT, &sc->sc_cbmap);
  579     }
  580     if (!not_ok) {
  581         steps = 10;
  582         not_ok = bus_dmamap_load(sc->sc_dmatag, sc->sc_cbmap,
  583                                  (caddr_t) pdq->pdq_cbp, sizeof(*pdq->pdq_cbp),
  584                                  NULL, BUS_DMA_NOWAIT);
  585     }
  586     if (!not_ok) {
  587         pdq->pdq_pa_consumer_block = sc->sc_cbmap->dm_segs[0].ds_addr;
  588         return not_ok;
  589     }
  590 
  591     switch (steps) {
  592         case 11: {
  593             bus_dmamap_unload(sc->sc_dmatag, sc->sc_cbmap);
  594             /* FALL THROUGH */
  595         }
  596         case 10: {
  597             bus_dmamap_destroy(sc->sc_dmatag, sc->sc_cbmap);
  598             /* FALL THROUGH */
  599         }
  600         case 9: {
  601             bus_dmamem_unmap(sc->sc_dmatag,
  602                              (caddr_t) pdq->pdq_cbp, sizeof(*pdq->pdq_cbp));
  603             /* FALL THROUGH */
  604         }
  605         case 8: {
  606             bus_dmamap_unload(sc->sc_dmatag, sc->sc_uimap);
  607             /* FALL THROUGH */
  608         }
  609         case 7: {
  610             bus_dmamap_destroy(sc->sc_dmatag, sc->sc_uimap);
  611             /* FALL THROUGH */
  612         }
  613         case 6: {
  614             bus_dmamem_unmap(sc->sc_dmatag,
  615                              (caddr_t) pdq->pdq_unsolicited_info.ui_events,
  616                              PDQ_OS_PAGESIZE);
  617             /* FALL THROUGH */
  618         }
  619         case 5: {
  620             bus_dmamem_free(sc->sc_dmatag, ui_segs, ui_nsegs);
  621             /* FALL THROUGH */
  622         }
  623         case 4: {
  624             bus_dmamap_unload(sc->sc_dmatag, sc->sc_dbmap);
  625             /* FALL THROUGH */
  626         }
  627         case 3: {
  628             bus_dmamap_destroy(sc->sc_dmatag, sc->sc_dbmap);
  629             /* FALL THROUGH */
  630         }
  631         case 2: {
  632             bus_dmamem_unmap(sc->sc_dmatag,
  633                              (caddr_t) pdq->pdq_dbp,
  634                              sizeof(*pdq->pdq_dbp));
  635             /* FALL THROUGH */
  636         }
  637         case 1: {
  638             bus_dmamem_free(sc->sc_dmatag, db_segs, db_nsegs);
  639             /* FALL THROUGH */
  640         }
  641     }
  642 
  643     return not_ok;
  644 }
  645 
  646 extern void
  647 pdq_os_descriptor_block_sync(
  648     pdq_os_ctx_t *sc,
  649     size_t offset,
  650     size_t length,
  651     int ops)
  652 {
  653     bus_dmamap_sync(sc->sc_dmatag, sc->sc_dbmap, offset, length, ops);
  654 }
  655 
  656 extern void
  657 pdq_os_consumer_block_sync(
  658     pdq_os_ctx_t *sc,
  659     int ops)
  660 {
  661     bus_dmamap_sync(sc->sc_dmatag, sc->sc_cbmap, 0, sizeof(pdq_consumer_block_t), ops);
  662 }
  663 
  664 extern void
  665 pdq_os_unsolicited_event_sync(
  666     pdq_os_ctx_t *sc,
  667     size_t offset,
  668     size_t length,
  669     int ops)
  670 {
  671     bus_dmamap_sync(sc->sc_dmatag, sc->sc_uimap, offset, length, ops);
  672 }
  673 
  674 extern void
  675 pdq_os_databuf_sync(
  676     pdq_os_ctx_t *sc,
  677     struct mbuf *m,
  678     size_t offset,
  679     size_t length,
  680     int ops)
  681 {
  682     bus_dmamap_sync(sc->sc_dmatag, M_GETCTX(m, bus_dmamap_t), offset, length, ops);
  683 }
  684 
  685 extern void
  686 pdq_os_databuf_free(
  687     pdq_os_ctx_t *sc,
  688     struct mbuf *m)
  689 {
  690     if (m->m_flags & (M_HASRXDMAMAP|M_HASTXDMAMAP)) {
  691         bus_dmamap_t map = M_GETCTX(m, bus_dmamap_t);
  692         bus_dmamap_unload(sc->sc_dmatag, map);
  693         bus_dmamap_destroy(sc->sc_dmatag, map);
  694         m->m_flags &= ~(M_HASRXDMAMAP|M_HASTXDMAMAP);
  695     }
  696     m_freem(m);
  697 }
  698 
  699 extern struct mbuf *
  700 pdq_os_databuf_alloc(
  701     pdq_os_ctx_t *sc)
  702 {
  703     struct mbuf *m;
  704     bus_dmamap_t map;
  705 
  706     MGETHDR(m, M_DONTWAIT, MT_DATA);
  707     if (m == NULL) {
  708         printf("%s: can't alloc small buf\n", sc->sc_dev.dv_xname);
  709         return NULL;
  710     }
  711     MCLGET(m, M_DONTWAIT);
  712     if ((m->m_flags & M_EXT) == 0) {
  713         printf("%s: can't alloc cluster\n", sc->sc_dev.dv_xname);
  714         m_free(m);
  715         return NULL;
  716     }
  717     m->m_pkthdr.len = m->m_len = PDQ_OS_DATABUF_SIZE;
  718 
  719     if (bus_dmamap_create(sc->sc_dmatag, PDQ_OS_DATABUF_SIZE,
  720                            1, PDQ_OS_DATABUF_SIZE, 0, BUS_DMA_NOWAIT, &map)) {
  721         printf("%s: can't create dmamap\n", sc->sc_dev.dv_xname);
  722         m_free(m);
  723         return NULL;
  724     }
  725     if (bus_dmamap_load_mbuf(sc->sc_dmatag, map, m,
  726                              BUS_DMA_READ|BUS_DMA_NOWAIT)) {
  727         printf("%s: can't load dmamap\n", sc->sc_dev.dv_xname);
  728         bus_dmamap_destroy(sc->sc_dmatag, map);
  729         m_free(m);
  730         return NULL;
  731     }
  732     m->m_flags |= M_HASRXDMAMAP;
  733     M_SETCTX(m, map);
  734     return m;
  735 }
  736 #endif
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FreeBSD/Linux Kernel Cross Reference sys/dev/pdq/pdq_ifsubr.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/pdq/pdq_ifsubr.c
