pdq_ifsubr.c

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    1 /*      $NetBSD: pdq_ifsubr.c,v 1.41 2005/02/27 00:27:02 perry 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  * Id: pdq_ifsubr.c,v 1.12 1997/06/05 01:56:35 thomas Exp
   27  *
   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 #include <sys/cdefs.h>
   38 __KERNEL_RCSID(0, "$NetBSD: pdq_ifsubr.c,v 1.41 2005/02/27 00:27:02 perry Exp $");
   39 
   40 #ifdef __NetBSD__
   41 #include "opt_inet.h"
   42 #include "opt_ns.h"
   43 #endif
   44 
   45 #include <sys/param.h>
   46 #include <sys/kernel.h>
   47 #include <sys/mbuf.h>
   48 #include <sys/protosw.h>
   49 #include <sys/socket.h>
   50 #include <sys/ioctl.h>
   51 #include <sys/errno.h>
   52 #include <sys/malloc.h>
   53 #if defined(__FreeBSD__) && BSD < 199401
   54 #include <sys/devconf.h>
   55 #elif defined(__bsdi__) || defined(__NetBSD__)
   56 #include <sys/device.h>
   57 #endif
   58 
   59 #include <net/if.h>
   60 #include <net/if_types.h>
   61 #include <net/if_dl.h>
   62 #if !defined(__NetBSD__)
   63 #include <net/route.h>
   64 #endif
   65 
   66 #include "bpfilter.h"
   67 #if NBPFILTER > 0
   68 #include <net/bpf.h>
   69 #include <net/bpfdesc.h>
   70 #endif
   71 
   72 #ifdef INET
   73 #include <netinet/in.h>
   74 #include <netinet/in_systm.h>
   75 #include <netinet/in_var.h>
   76 #include <netinet/ip.h>
   77 #if defined(__NetBSD__)
   78 #include <netinet/if_inarp.h>
   79 #endif
   80 #endif
   81 #if defined(__FreeBSD__)
   82 #include <netinet/if_ether.h>
   83 #include <netinet/if_fddi.h>
   84 #else
   85 #include <net/if_fddi.h>
   86 #endif
   87 
   88 #if defined(__bsdi__)
   89 #include <netinet/if_ether.h>
   90 #include <i386/isa/isavar.h>
   91 #endif
   92 
   93 #ifdef NS
   94 #include <netns/ns.h>
   95 #include <netns/ns_if.h>
   96 #endif
   97 
   98 #ifndef __NetBSD__
   99 #include <vm/vm.h>
  100 #endif
  101 
  102 #if defined(__FreeBSD__)
  103 /*
  104  * Yet another specific ifdef for FreeBSD as it diverges...
  105  */
  106 #include <dev/pdq/pdqvar.h>
  107 #include <dev/pdq/pdqreg.h>
  108 #else
  109 #include "pdqvar.h"
  110 #include "pdqreg.h"
  111 #endif
  112 
  113 #if defined(__bsdi__) && _BSDI_VERSION < 199506 /* XXX */
  114 static void
  115 arp_ifinit(
  116     struct arpcom *ac,
  117     struct ifaddr *ifa)
  118 {
  119     sc->sc_ac.ac_ipaddr = IA_SIN(ifa)->sin_addr;
  120     arpwhohas(&sc->sc_ac, &IA_SIN(ifa)->sin_addr);
  121 #if _BSDI_VERSION >= 199401
  122     ifa->ifa_rtrequest = arp_rtrequest;
  123     ifa->ifa_flags |= RTF_CLONING;
  124 #endif
  125 #endif
  126 
  127 
  128 void
  129 pdq_ifinit(
  130     pdq_softc_t *sc)
  131 {
  132     if (sc->sc_if.if_flags & IFF_UP) {
  133         sc->sc_if.if_flags |= IFF_RUNNING;
  134 #if NBPFILTER > 0
  135         if (sc->sc_if.if_flags & IFF_PROMISC) {
  136             sc->sc_pdq->pdq_flags |= PDQ_PROMISC;
  137         } else {
  138             sc->sc_pdq->pdq_flags &= ~PDQ_PROMISC;
  139         }
  140 #endif
  141         if (sc->sc_if.if_flags & IFF_LINK1) {
  142             sc->sc_pdq->pdq_flags |= PDQ_PASS_SMT;
  143         } else {
  144             sc->sc_pdq->pdq_flags &= ~PDQ_PASS_SMT;
  145         }
  146         sc->sc_pdq->pdq_flags |= PDQ_RUNNING;
  147         pdq_run(sc->sc_pdq);
  148     } else {
  149         sc->sc_if.if_flags &= ~IFF_RUNNING;
  150         sc->sc_pdq->pdq_flags &= ~PDQ_RUNNING;
  151         pdq_stop(sc->sc_pdq);
  152     }
  153 }
  154 
  155 void
  156 pdq_ifwatchdog(
  157     struct ifnet *ifp)
  158 {
  159     /*
  160      * No progress was made on the transmit queue for PDQ_OS_TX_TRANSMIT
  161      * seconds.  Remove all queued packets.
  162      */
  163 
  164     ifp->if_flags &= ~IFF_OACTIVE;
  165     ifp->if_timer = 0;
  166     for (;;) {
  167         struct mbuf *m;
  168         IFQ_DEQUEUE(&ifp->if_snd, m);
  169         if (m == NULL)
  170             return;
  171         PDQ_OS_DATABUF_FREE(PDQ_OS_IFP_TO_SOFTC(ifp)->sc_pdq, m);
  172     }
  173 }
  174 
  175 ifnet_ret_t
  176 pdq_ifstart(
  177     struct ifnet *ifp)
  178 {
  179     pdq_softc_t * const sc = PDQ_OS_IFP_TO_SOFTC(ifp);
  180     struct mbuf *m;
  181     int tx = 0;
  182 
  183     if ((ifp->if_flags & IFF_RUNNING) == 0)
  184         return;
  185 
  186     if (sc->sc_if.if_timer == 0)
  187         sc->sc_if.if_timer = PDQ_OS_TX_TIMEOUT;
  188 
  189     if ((sc->sc_pdq->pdq_flags & PDQ_TXOK) == 0) {
  190         sc->sc_if.if_flags |= IFF_OACTIVE;
  191         return;
  192     }
  193     sc->sc_flags |= PDQIF_DOWNCALL;
  194     for (;; tx = 1) {
  195         IFQ_POLL(&ifp->if_snd, m);
  196         if (m == NULL)
  197             break;
  198 #if defined(PDQ_BUS_DMA) && !defined(PDQ_BUS_DMA_NOTX)
  199         if ((m->m_flags & M_HASTXDMAMAP) == 0) {
  200             bus_dmamap_t map;
  201             if (PDQ_OS_HDR_OFFSET != PDQ_RX_FC_OFFSET) {
  202                 m->m_data[0] = PDQ_FDDI_PH0;
  203                 m->m_data[1] = PDQ_FDDI_PH1;
  204                 m->m_data[2] = PDQ_FDDI_PH2;
  205             }
  206             if (!bus_dmamap_create(sc->sc_dmatag, m->m_pkthdr.len, 255,
  207                                    m->m_pkthdr.len, 0, BUS_DMA_NOWAIT, &map)) {
  208                 if (!bus_dmamap_load_mbuf(sc->sc_dmatag, map, m,
  209                                           BUS_DMA_WRITE|BUS_DMA_NOWAIT)) {
  210                     bus_dmamap_sync(sc->sc_dmatag, map, 0, m->m_pkthdr.len,
  211                                     BUS_DMASYNC_PREWRITE);
  212                     M_SETCTX(m, map);
  213                     m->m_flags |= M_HASTXDMAMAP;
  214                 }
  215             }
  216             if ((m->m_flags & M_HASTXDMAMAP) == 0)
  217                 break;
  218         }
  219 #else
  220         if (PDQ_OS_HDR_OFFSET != PDQ_RX_FC_OFFSET) {
  221             m->m_data[0] = PDQ_FDDI_PH0;
  222             m->m_data[1] = PDQ_FDDI_PH1;
  223             m->m_data[2] = PDQ_FDDI_PH2;
  224         }
  225 #endif
  226 
  227         if (pdq_queue_transmit_data(sc->sc_pdq, m) == PDQ_FALSE)
  228             break;
  229         IFQ_DEQUEUE(&ifp->if_snd, m);
  230     }
  231     if (m != NULL)
  232         ifp->if_flags |= IFF_OACTIVE;
  233     if (tx)
  234         PDQ_DO_TYPE2_PRODUCER(sc->sc_pdq);
  235     sc->sc_flags &= ~PDQIF_DOWNCALL;
  236 }
  237 
  238 void
  239 pdq_os_receive_pdu(
  240     pdq_t *pdq,
  241     struct mbuf *m,
  242     size_t pktlen,
  243     int drop)
  244 {
  245     pdq_softc_t *sc = pdq->pdq_os_ctx;
  246     struct fddi_header *fh;
  247 
  248     sc->sc_if.if_ipackets++;
  249 #if defined(PDQ_BUS_DMA)
  250     {
  251         /*
  252          * Even though the first mbuf start at the first fddi header octet,
  253          * the dmamap starts PDQ_OS_HDR_OFFSET octets earlier.  Any additional
  254          * mbufs will start normally.
  255          */
  256         int offset = PDQ_OS_HDR_OFFSET;
  257         struct mbuf *m0;
  258         for (m0 = m; m0 != NULL; m0 = m0->m_next, offset = 0) {
  259             pdq_os_databuf_sync(sc, m0, offset, m0->m_len, BUS_DMASYNC_POSTREAD);
  260             bus_dmamap_unload(sc->sc_dmatag, M_GETCTX(m0, bus_dmamap_t));
  261             bus_dmamap_destroy(sc->sc_dmatag, M_GETCTX(m0, bus_dmamap_t));
  262             m0->m_flags &= ~M_HASRXDMAMAP;
  263             M_SETCTX(m0, NULL);
  264         }
  265     }
  266 #endif
  267     m->m_pkthdr.len = pktlen;
  268 #if NBPFILTER > 0
  269     if (sc->sc_bpf != NULL)
  270         PDQ_BPF_MTAP(sc, m);
  271 #endif
  272     fh = mtod(m, struct fddi_header *);
  273     if (drop || (fh->fddi_fc & (FDDIFC_L|FDDIFC_F)) != FDDIFC_LLC_ASYNC) {
  274         PDQ_OS_DATABUF_FREE(pdq, m);
  275         return;
  276     }
  277 
  278     m->m_pkthdr.rcvif = &sc->sc_if;
  279     (*sc->sc_if.if_input)(&sc->sc_if, m);
  280 }
  281 
  282 void
  283 pdq_os_restart_transmitter(
  284     pdq_t *pdq)
  285 {
  286     pdq_softc_t *sc = pdq->pdq_os_ctx;
  287     sc->sc_if.if_flags &= ~IFF_OACTIVE;
  288     if (IFQ_IS_EMPTY(&sc->sc_if.if_snd) == 0) {
  289         sc->sc_if.if_timer = PDQ_OS_TX_TIMEOUT;
  290         if ((sc->sc_flags & PDQIF_DOWNCALL) == 0)
  291             pdq_ifstart(&sc->sc_if);
  292     } else {
  293         sc->sc_if.if_timer = 0;
  294     }
  295 }
  296 
  297 void
  298 pdq_os_transmit_done(
  299     pdq_t *pdq,
  300     struct mbuf *m)
  301 {
  302     pdq_softc_t *sc = pdq->pdq_os_ctx;
  303 #if NBPFILTER > 0
  304     if (sc->sc_bpf != NULL)
  305         PDQ_BPF_MTAP(sc, m);
  306 #endif
  307     PDQ_OS_DATABUF_FREE(pdq, m);
  308     sc->sc_if.if_opackets++;
  309 }
  310 
  311 void
  312 pdq_os_addr_fill(
  313     pdq_t *pdq,
  314     pdq_lanaddr_t *addr,
  315     size_t num_addrs)
  316 {
  317     pdq_softc_t *sc = pdq->pdq_os_ctx;
  318     struct ether_multistep step;
  319     struct ether_multi *enm;
  320 
  321     /*
  322      * ADDR_FILTER_SET is always issued before FILTER_SET so
  323      * we can play with PDQ_ALLMULTI and not worry about
  324      * queueing a FILTER_SET ourselves.
  325      */
  326 
  327     pdq->pdq_flags &= ~PDQ_ALLMULTI;
  328 #if defined(IFF_ALLMULTI)
  329     sc->sc_if.if_flags &= ~IFF_ALLMULTI;
  330 #endif
  331 
  332     ETHER_FIRST_MULTI(step, PDQ_FDDICOM(sc), enm);
  333     while (enm != NULL && num_addrs > 0) {
  334         if (memcmp(enm->enm_addrlo, enm->enm_addrhi, 6) == 0) {
  335             ((u_short *) addr->lanaddr_bytes)[0] = ((u_short *) enm->enm_addrlo)[0];
  336             ((u_short *) addr->lanaddr_bytes)[1] = ((u_short *) enm->enm_addrlo)[1];
  337             ((u_short *) addr->lanaddr_bytes)[2] = ((u_short *) enm->enm_addrlo)[2];
  338             addr++;
  339             num_addrs--;
  340         } else {
  341             pdq->pdq_flags |= PDQ_ALLMULTI;
  342 #if defined(IFF_ALLMULTI)
  343             sc->sc_if.if_flags |= IFF_ALLMULTI;
  344 #endif
  345         }
  346         ETHER_NEXT_MULTI(step, enm);
  347     }
  348     /*
  349      * If not all the address fit into the CAM, turn on all-multicast mode.
  350      */
  351     if (enm != NULL) {
  352         pdq->pdq_flags |= PDQ_ALLMULTI;
  353 #if defined(IFF_ALLMULTI)
  354         sc->sc_if.if_flags |= IFF_ALLMULTI;
  355 #endif
  356     }
  357 }
  358 
  359 #if defined(IFM_FDDI)
  360 static int
  361 pdq_ifmedia_change(
  362     struct ifnet *ifp)
  363 {
  364     pdq_softc_t * const sc = PDQ_OS_IFP_TO_SOFTC(ifp);
  365 
  366     if (sc->sc_ifmedia.ifm_media & IFM_FDX) {
  367         if ((sc->sc_pdq->pdq_flags & PDQ_WANT_FDX) == 0) {
  368             sc->sc_pdq->pdq_flags |= PDQ_WANT_FDX;
  369             if (sc->sc_pdq->pdq_flags & PDQ_RUNNING)
  370                 pdq_run(sc->sc_pdq);
  371         }
  372     } else if (sc->sc_pdq->pdq_flags & PDQ_WANT_FDX) {
  373         sc->sc_pdq->pdq_flags &= ~PDQ_WANT_FDX;
  374         if (sc->sc_pdq->pdq_flags & PDQ_RUNNING)
  375             pdq_run(sc->sc_pdq);
  376     }
  377 
  378     return 0;
  379 }
  380 
  381 static void
  382 pdq_ifmedia_status(
  383     struct ifnet *ifp,
  384     struct ifmediareq *ifmr)
  385 {
  386     pdq_softc_t * const sc = PDQ_OS_IFP_TO_SOFTC(ifp);
  387 
  388     ifmr->ifm_status = IFM_AVALID;
  389     if (sc->sc_pdq->pdq_flags & PDQ_IS_ONRING)
  390         ifmr->ifm_status |= IFM_ACTIVE;
  391 
  392     ifmr->ifm_active = (ifmr->ifm_current & ~IFM_FDX);
  393     if (sc->sc_pdq->pdq_flags & PDQ_IS_FDX)
  394         ifmr->ifm_active |= IFM_FDX;
  395 }
  396 
  397 void
  398 pdq_os_update_status(
  399     pdq_t *pdq,
  400     const void *arg)
  401 {
  402     pdq_softc_t * const sc = pdq->pdq_os_ctx;
  403     const pdq_response_status_chars_get_t *rsp = arg;
  404     int media = 0;
  405 
  406     switch (rsp->status_chars_get.pmd_type[0]) {
  407         case PDQ_PMD_TYPE_ANSI_MUTLI_MODE:         media = IFM_FDDI_MMF; break;
  408         case PDQ_PMD_TYPE_ANSI_SINGLE_MODE_TYPE_1: media = IFM_FDDI_SMF; break;
  409         case PDQ_PMD_TYPE_ANSI_SIGNLE_MODE_TYPE_2: media = IFM_FDDI_SMF; break;
  410         case PDQ_PMD_TYPE_UNSHIELDED_TWISTED_PAIR: media = IFM_FDDI_UTP; break;
  411         default: media |= IFM_MANUAL;
  412     }
  413 
  414     if (rsp->status_chars_get.station_type == PDQ_STATION_TYPE_DAS)
  415         media |= IFM_FDDI_DA;
  416 
  417     sc->sc_ifmedia.ifm_media = media | IFM_FDDI;
  418 }
  419 #endif /* defined(IFM_FDDI) */
  420 
  421 int
  422 pdq_ifioctl(
  423     struct ifnet *ifp,
  424     ioctl_cmd_t cmd,
  425     caddr_t data)
  426 {
  427     pdq_softc_t *sc = PDQ_OS_IFP_TO_SOFTC(ifp);
  428     int s, error = 0;
  429 
  430     s = PDQ_OS_SPL_RAISE();
  431 
  432     switch (cmd) {
  433         case SIOCSIFADDR: {
  434             struct ifaddr *ifa = (struct ifaddr *)data;
  435 
  436             ifp->if_flags |= IFF_UP;
  437             switch(ifa->ifa_addr->sa_family) {
  438 #if defined(INET)
  439                 case AF_INET: {
  440                     pdq_ifinit(sc);
  441                     PDQ_ARP_IFINIT(sc, ifa);
  442                     break;
  443                 }
  444 #endif /* INET */
  445 
  446 #if defined(NS)
  447                 /* This magic copied from if_is.c; I don't use XNS,
  448                  * so I have no way of telling if this actually
  449                  * works or not.
  450                  */
  451                 case AF_NS: {
  452                     struct ns_addr *ina = &(IA_SNS(ifa)->sns_addr);
  453                     if (ns_nullhost(*ina)) {
  454                         ina->x_host = *(union ns_host *)PDQ_LANADDR(sc);
  455                     } else {
  456                         ifp->if_flags &= ~IFF_RUNNING;
  457                         memcpy((caddr_t)PDQ_LANADDR(sc),
  458                             (caddr_t)ina->x_host.c_host,
  459                             PDQ_LANADDR_SIZE(sc));
  460                     }
  461 
  462                     pdq_ifinit(sc);
  463                     break;
  464                 }
  465 #endif /* NS */
  466 
  467                 default: {
  468                     pdq_ifinit(sc);
  469                     break;
  470                 }
  471             }
  472             break;
  473         }
  474         case SIOCGIFADDR: {
  475             struct ifreq *ifr = (struct ifreq *)data;
  476             memcpy((caddr_t) ((struct sockaddr *)&ifr->ifr_data)->sa_data,
  477                 (caddr_t) PDQ_LANADDR(sc), 6);
  478             break;
  479         }
  480 
  481         case SIOCSIFFLAGS: {
  482             pdq_ifinit(sc);
  483             break;
  484         }
  485 
  486         case SIOCADDMULTI:
  487         case SIOCDELMULTI: {
  488             /*
  489              * Update multicast listeners
  490              */
  491             if (cmd == SIOCADDMULTI)
  492                 error = ether_addmulti((struct ifreq *)data, PDQ_FDDICOM(sc));
  493             else
  494                 error = ether_delmulti((struct ifreq *)data, PDQ_FDDICOM(sc));
  495 
  496             if (error == ENETRESET) {
  497                 if (sc->sc_if.if_flags & IFF_RUNNING)
  498                     pdq_run(sc->sc_pdq);
  499                 error = 0;
  500             }
  501             break;
  502         }
  503 
  504 #if defined(SIOCSIFMTU)
  505 #if !defined(ifr_mtu)
  506 #define ifr_mtu ifr_metric
  507 #endif
  508         case SIOCSIFMTU: {
  509             struct ifreq *ifr = (struct ifreq *)data;
  510             /*
  511              * Set the interface MTU.
  512              */
  513             if (ifr->ifr_mtu > FDDIMTU) {
  514                 error = EINVAL;
  515                 break;
  516             }
  517             ifp->if_mtu = ifr->ifr_mtu;
  518             break;
  519         }
  520 #endif /* SIOCSIFMTU */
  521 
  522 #if defined(IFM_FDDI) && defined(SIOCSIFMEDIA)
  523         case SIOCSIFMEDIA:
  524         case SIOCGIFMEDIA: {
  525             struct ifreq *ifr = (struct ifreq *)data;
  526             error = ifmedia_ioctl(ifp, ifr, &sc->sc_ifmedia, cmd);
  527             break;
  528         }
  529 #endif
  530 
  531         default: {
  532             error = EINVAL;
  533             break;
  534         }
  535     }
  536 
  537     PDQ_OS_SPL_LOWER(s);
  538     return error;
  539 }
  540 
  541 #ifndef IFF_NOTRAILERS
  542 #define IFF_NOTRAILERS  0
  543 #endif
  544 
  545 void
  546 pdq_ifattach(
  547     pdq_softc_t *sc,
  548     ifnet_ret_t (*ifwatchdog)(int unit))
  549 {
  550     struct ifnet *ifp = &sc->sc_if;
  551 
  552     ifp->if_flags = IFF_BROADCAST|IFF_SIMPLEX|IFF_NOTRAILERS|IFF_MULTICAST;
  553 
  554 #if (defined(__FreeBSD__) && BSD >= 199506) || defined(__NetBSD__)
  555     ifp->if_watchdog = pdq_ifwatchdog;
  556 #else
  557     ifp->if_watchdog = ifwatchdog;
  558 #endif
  559 
  560     ifp->if_ioctl = pdq_ifioctl;
  561 #if !defined(__NetBSD__)
  562     ifp->if_output = fddi_output;
  563 #endif
  564     ifp->if_start = pdq_ifstart;
  565     IFQ_SET_READY(&ifp->if_snd);
  566 
  567 #if defined(IFM_FDDI)
  568     {
  569         const int media = sc->sc_ifmedia.ifm_media;
  570         ifmedia_init(&sc->sc_ifmedia, IFM_FDX,
  571                      pdq_ifmedia_change, pdq_ifmedia_status);
  572         ifmedia_add(&sc->sc_ifmedia, media, 0, 0);
  573         ifmedia_set(&sc->sc_ifmedia, media);
  574     }
  575 #endif
  576 
  577     if_attach(ifp);
  578 #if defined(__NetBSD__)
  579     fddi_ifattach(ifp, (caddr_t)&sc->sc_pdq->pdq_hwaddr);
  580 #else
  581     fddi_ifattach(ifp);
  582 #endif
  583 }
  584 
  585 #if defined(PDQ_BUS_DMA)
  586 int
  587 pdq_os_memalloc_contig(
  588     pdq_t *pdq)
  589 {
  590     pdq_softc_t * const sc = pdq->pdq_os_ctx;
  591     bus_dma_segment_t db_segs[1], ui_segs[1], cb_segs[1];
  592     int db_nsegs = 0, ui_nsegs = 0;
  593     int steps = 0;
  594     int not_ok;
  595 
  596     not_ok = bus_dmamem_alloc(sc->sc_dmatag,
  597                          sizeof(*pdq->pdq_dbp), sizeof(*pdq->pdq_dbp),
  598                          sizeof(*pdq->pdq_dbp), db_segs, 1, &db_nsegs,
  599                          BUS_DMA_NOWAIT);
  600     if (!not_ok) {
  601         steps = 1;
  602         not_ok = bus_dmamem_map(sc->sc_dmatag, db_segs, db_nsegs,
  603                                 sizeof(*pdq->pdq_dbp), (caddr_t *) &pdq->pdq_dbp,
  604                                 BUS_DMA_NOWAIT);
  605     }
  606     if (!not_ok) {
  607         steps = 2;
  608         not_ok = bus_dmamap_create(sc->sc_dmatag, db_segs[0].ds_len, 1,
  609                                    0x2000, 0, BUS_DMA_NOWAIT, &sc->sc_dbmap);
  610     }
  611     if (!not_ok) {
  612         steps = 3;
  613         not_ok = bus_dmamap_load(sc->sc_dmatag, sc->sc_dbmap,
  614                                  pdq->pdq_dbp, sizeof(*pdq->pdq_dbp),
  615                                  NULL, BUS_DMA_NOWAIT);
  616     }
  617     if (!not_ok) {
  618         steps = 4;
  619         pdq->pdq_pa_descriptor_block = sc->sc_dbmap->dm_segs[0].ds_addr;
  620         not_ok = bus_dmamem_alloc(sc->sc_dmatag,
  621                          PDQ_OS_PAGESIZE, PDQ_OS_PAGESIZE, PDQ_OS_PAGESIZE,
  622                          ui_segs, 1, &ui_nsegs, BUS_DMA_NOWAIT);
  623     }
  624     if (!not_ok) {
  625         steps = 5;
  626         not_ok = bus_dmamem_map(sc->sc_dmatag, ui_segs, ui_nsegs,
  627                             PDQ_OS_PAGESIZE,
  628                             (caddr_t *) &pdq->pdq_unsolicited_info.ui_events,
  629                             BUS_DMA_NOWAIT);
  630     }
  631     if (!not_ok) {
  632         steps = 6;
  633         not_ok = bus_dmamap_create(sc->sc_dmatag, ui_segs[0].ds_len, 1,
  634                                    PDQ_OS_PAGESIZE, 0, BUS_DMA_NOWAIT,
  635                                    &sc->sc_uimap);
  636     }
  637     if (!not_ok) {
  638         steps = 7;
  639         not_ok = bus_dmamap_load(sc->sc_dmatag, sc->sc_uimap,
  640                                  pdq->pdq_unsolicited_info.ui_events,
  641                                  PDQ_OS_PAGESIZE, NULL, BUS_DMA_NOWAIT);
  642     }
  643     if (!not_ok) {
  644         steps = 8;
  645         pdq->pdq_unsolicited_info.ui_pa_bufstart = sc->sc_uimap->dm_segs[0].ds_addr;
  646         cb_segs[0] = db_segs[0];
  647         cb_segs[0].ds_addr += offsetof(pdq_descriptor_block_t, pdqdb_consumer);
  648         cb_segs[0].ds_len = sizeof(pdq_consumer_block_t);
  649         not_ok = bus_dmamem_map(sc->sc_dmatag, cb_segs, 1,
  650                                 sizeof(*pdq->pdq_cbp), (caddr_t *) &pdq->pdq_cbp,
  651                                 BUS_DMA_NOWAIT|BUS_DMA_COHERENT);
  652     }
  653     if (!not_ok) {
  654         steps = 9;
  655         not_ok = bus_dmamap_create(sc->sc_dmatag, cb_segs[0].ds_len, 1,
  656                                    0x2000, 0, BUS_DMA_NOWAIT, &sc->sc_cbmap);
  657     }
  658     if (!not_ok) {
  659         steps = 10;
  660         not_ok = bus_dmamap_load(sc->sc_dmatag, sc->sc_cbmap,
  661                                  (caddr_t) pdq->pdq_cbp, sizeof(*pdq->pdq_cbp),
  662                                  NULL, BUS_DMA_NOWAIT);
  663     }
  664     if (!not_ok) {
  665         pdq->pdq_pa_consumer_block = sc->sc_cbmap->dm_segs[0].ds_addr;
  666         return not_ok;
  667     }
  668 
  669     switch (steps) {
  670         case 11: {
  671             bus_dmamap_unload(sc->sc_dmatag, sc->sc_cbmap);
  672             /* FALL THROUGH */
  673         }
  674         case 10: {
  675             bus_dmamap_destroy(sc->sc_dmatag, sc->sc_cbmap);
  676             /* FALL THROUGH */
  677         }
  678         case 9: {
  679             bus_dmamem_unmap(sc->sc_dmatag,
  680                              (caddr_t) pdq->pdq_cbp, sizeof(*pdq->pdq_cbp));
  681             /* FALL THROUGH */
  682         }
  683         case 8: {
  684             bus_dmamap_unload(sc->sc_dmatag, sc->sc_uimap);
  685             /* FALL THROUGH */
  686         }
  687         case 7: {
  688             bus_dmamap_destroy(sc->sc_dmatag, sc->sc_uimap);
  689             /* FALL THROUGH */
  690         }
  691         case 6: {
  692             bus_dmamem_unmap(sc->sc_dmatag,
  693                              (caddr_t) pdq->pdq_unsolicited_info.ui_events,
  694                              PDQ_OS_PAGESIZE);
  695             /* FALL THROUGH */
  696         }
  697         case 5: {
  698             bus_dmamem_free(sc->sc_dmatag, ui_segs, ui_nsegs);
  699             /* FALL THROUGH */
  700         }
  701         case 4: {
  702             bus_dmamap_unload(sc->sc_dmatag, sc->sc_dbmap);
  703             /* FALL THROUGH */
  704         }
  705         case 3: {
  706             bus_dmamap_destroy(sc->sc_dmatag, sc->sc_dbmap);
  707             /* FALL THROUGH */
  708         }
  709         case 2: {
  710             bus_dmamem_unmap(sc->sc_dmatag,
  711                              (caddr_t) pdq->pdq_dbp,
  712                              sizeof(*pdq->pdq_dbp));
  713             /* FALL THROUGH */
  714         }
  715         case 1: {
  716             bus_dmamem_free(sc->sc_dmatag, db_segs, db_nsegs);
  717             /* FALL THROUGH */
  718         }
  719     }
  720 
  721     return not_ok;
  722 }
  723 
  724 extern void
  725 pdq_os_descriptor_block_sync(
  726     pdq_os_ctx_t *sc,
  727     size_t offset,
  728     size_t length,
  729     int ops)
  730 {
  731     bus_dmamap_sync(sc->sc_dmatag, sc->sc_dbmap, offset, length, ops);
  732 }
  733 
  734 extern void
  735 pdq_os_consumer_block_sync(
  736     pdq_os_ctx_t *sc,
  737     int ops)
  738 {
  739     bus_dmamap_sync(sc->sc_dmatag, sc->sc_cbmap, 0, sizeof(pdq_consumer_block_t), ops);
  740 }
  741 
  742 extern void
  743 pdq_os_unsolicited_event_sync(
  744     pdq_os_ctx_t *sc,
  745     size_t offset,
  746     size_t length,
  747     int ops)
  748 {
  749     bus_dmamap_sync(sc->sc_dmatag, sc->sc_uimap, offset, length, ops);
  750 }
  751 
  752 extern void
  753 pdq_os_databuf_sync(
  754     pdq_os_ctx_t *sc,
  755     struct mbuf *m,
  756     size_t offset,
  757     size_t length,
  758     int ops)
  759 {
  760     bus_dmamap_sync(sc->sc_dmatag, M_GETCTX(m, bus_dmamap_t), offset, length, ops);
  761 }
  762 
  763 extern void
  764 pdq_os_databuf_free(
  765     pdq_os_ctx_t *sc,
  766     struct mbuf *m)
  767 {
  768     if (m->m_flags & (M_HASRXDMAMAP|M_HASTXDMAMAP)) {
  769         bus_dmamap_t map = M_GETCTX(m, bus_dmamap_t);
  770         bus_dmamap_unload(sc->sc_dmatag, map);
  771         bus_dmamap_destroy(sc->sc_dmatag, map);
  772         m->m_flags &= ~(M_HASRXDMAMAP|M_HASTXDMAMAP);
  773     }
  774     m_freem(m);
  775 }
  776 
  777 extern struct mbuf *
  778 pdq_os_databuf_alloc(
  779     pdq_os_ctx_t *sc)
  780 {
  781     struct mbuf *m;
  782     bus_dmamap_t map;
  783 
  784     MGETHDR(m, M_DONTWAIT, MT_DATA);
  785     if (m == NULL) {
  786         printf("%s: can't alloc small buf\n", sc->sc_dev.dv_xname);
  787         return NULL;
  788     }
  789     MCLGET(m, M_DONTWAIT);
  790     if ((m->m_flags & M_EXT) == 0) {
  791         printf("%s: can't alloc cluster\n", sc->sc_dev.dv_xname);
  792         m_free(m);
  793         return NULL;
  794     }
  795     MCLAIM(m, &PDQ_FDDICOM(sc)->ec_rx_mowner);
  796     m->m_pkthdr.len = m->m_len = PDQ_OS_DATABUF_SIZE;
  797 
  798     if (bus_dmamap_create(sc->sc_dmatag, PDQ_OS_DATABUF_SIZE,
  799                            1, PDQ_OS_DATABUF_SIZE, 0, BUS_DMA_NOWAIT, &map)) {
  800         printf("%s: can't create dmamap\n", sc->sc_dev.dv_xname);
  801         m_free(m);
  802         return NULL;
  803     }
  804     if (bus_dmamap_load_mbuf(sc->sc_dmatag, map, m,
  805                              BUS_DMA_READ|BUS_DMA_NOWAIT)) {
  806         printf("%s: can't load dmamap\n", sc->sc_dev.dv_xname);
  807         bus_dmamap_destroy(sc->sc_dmatag, map);
  808         m_free(m);
  809         return NULL;
  810     }
  811     m->m_flags |= M_HASRXDMAMAP;
  812     M_SETCTX(m, map);
  813     return m;
  814 }
  815 #endif
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FreeBSD/Linux Kernel Cross Reference sys/dev/ic/pdq_ifsubr.c

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