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


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FreeBSD/Linux Kernel Cross Reference
sys/dev/malo/if_malo.c

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    1 /*-
    2  * Copyright (c) 2008 Weongyo Jeong <weongyo@freebsd.org>
    3  * Copyright (c) 2007 Marvell Semiconductor, Inc.
    4  * Copyright (c) 2007 Sam Leffler, Errno Consulting
    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  *    without modification.
   13  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
   14  *    similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
   15  *    redistribution must be conditioned upon including a substantially
   16  *    similar Disclaimer requirement for further binary redistribution.
   17  *
   18  * NO WARRANTY
   19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   21  * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
   22  * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
   23  * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
   24  * OR 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
   27  * IN 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
   29  * THE POSSIBILITY OF SUCH DAMAGES.
   30  */
   31 
   32 #include <sys/cdefs.h>
   33 #ifdef __FreeBSD__
   34 __FBSDID("$FreeBSD: releng/10.2/sys/dev/malo/if_malo.c 278808 2015-02-15 20:02:29Z marius $");
   35 #endif
   36 
   37 #include "opt_malo.h"
   38 
   39 #include <sys/param.h>
   40 #include <sys/endian.h>
   41 #include <sys/kernel.h>
   42 #include <sys/socket.h>
   43 #include <sys/sockio.h>
   44 #include <sys/sysctl.h>
   45 #include <sys/taskqueue.h>
   46 
   47 #include <machine/bus.h>
   48 #include <sys/bus.h>
   49 
   50 #include <net/if.h>
   51 #include <net/if_dl.h>
   52 #include <net/if_media.h>
   53 #include <net/if_types.h>
   54 #include <net/ethernet.h>
   55 
   56 #include <net80211/ieee80211_var.h>
   57 #include <net80211/ieee80211_regdomain.h>
   58 
   59 #include <net/bpf.h>
   60 
   61 #include <dev/malo/if_malo.h>
   62 
   63 SYSCTL_NODE(_hw, OID_AUTO, malo, CTLFLAG_RD, 0,
   64     "Marvell 88w8335 driver parameters");
   65 
   66 static  int malo_txcoalesce = 8;        /* # tx pkts to q before poking f/w*/
   67 SYSCTL_INT(_hw_malo, OID_AUTO, txcoalesce, CTLFLAG_RW, &malo_txcoalesce,
   68             0, "tx buffers to send at once");
   69 TUNABLE_INT("hw.malo.txcoalesce", &malo_txcoalesce);
   70 static  int malo_rxbuf = MALO_RXBUF;            /* # rx buffers to allocate */
   71 SYSCTL_INT(_hw_malo, OID_AUTO, rxbuf, CTLFLAG_RW, &malo_rxbuf,
   72             0, "rx buffers allocated");
   73 TUNABLE_INT("hw.malo.rxbuf", &malo_rxbuf);
   74 static  int malo_rxquota = MALO_RXBUF;          /* # max buffers to process */
   75 SYSCTL_INT(_hw_malo, OID_AUTO, rxquota, CTLFLAG_RW, &malo_rxquota,
   76             0, "max rx buffers to process per interrupt");
   77 TUNABLE_INT("hw.malo.rxquota", &malo_rxquota);
   78 static  int malo_txbuf = MALO_TXBUF;            /* # tx buffers to allocate */
   79 SYSCTL_INT(_hw_malo, OID_AUTO, txbuf, CTLFLAG_RW, &malo_txbuf,
   80             0, "tx buffers allocated");
   81 TUNABLE_INT("hw.malo.txbuf", &malo_txbuf);
   82 
   83 #ifdef MALO_DEBUG
   84 static  int malo_debug = 0;
   85 SYSCTL_INT(_hw_malo, OID_AUTO, debug, CTLFLAG_RW, &malo_debug,
   86             0, "control debugging printfs");
   87 TUNABLE_INT("hw.malo.debug", &malo_debug);
   88 enum {
   89         MALO_DEBUG_XMIT         = 0x00000001,   /* basic xmit operation */
   90         MALO_DEBUG_XMIT_DESC    = 0x00000002,   /* xmit descriptors */
   91         MALO_DEBUG_RECV         = 0x00000004,   /* basic recv operation */
   92         MALO_DEBUG_RECV_DESC    = 0x00000008,   /* recv descriptors */
   93         MALO_DEBUG_RESET        = 0x00000010,   /* reset processing */
   94         MALO_DEBUG_INTR         = 0x00000040,   /* ISR */
   95         MALO_DEBUG_TX_PROC      = 0x00000080,   /* tx ISR proc */
   96         MALO_DEBUG_RX_PROC      = 0x00000100,   /* rx ISR proc */
   97         MALO_DEBUG_STATE        = 0x00000400,   /* 802.11 state transitions */
   98         MALO_DEBUG_NODE         = 0x00000800,   /* node management */
   99         MALO_DEBUG_RECV_ALL     = 0x00001000,   /* trace all frames (beacons) */
  100         MALO_DEBUG_FW           = 0x00008000,   /* firmware */
  101         MALO_DEBUG_ANY          = 0xffffffff
  102 };
  103 #define IS_BEACON(wh)                                                   \
  104         ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK |                      \
  105                 IEEE80211_FC0_SUBTYPE_MASK)) ==                         \
  106          (IEEE80211_FC0_TYPE_MGT|IEEE80211_FC0_SUBTYPE_BEACON))
  107 #define IFF_DUMPPKTS_RECV(sc, wh)                                       \
  108         (((sc->malo_debug & MALO_DEBUG_RECV) &&                         \
  109           ((sc->malo_debug & MALO_DEBUG_RECV_ALL) || !IS_BEACON(wh))) || \
  110          (sc->malo_ifp->if_flags & (IFF_DEBUG|IFF_LINK2)) ==            \
  111           (IFF_DEBUG|IFF_LINK2))
  112 #define IFF_DUMPPKTS_XMIT(sc)                                           \
  113         ((sc->malo_debug & MALO_DEBUG_XMIT) ||                          \
  114          (sc->malo_ifp->if_flags & (IFF_DEBUG | IFF_LINK2)) ==          \
  115              (IFF_DEBUG | IFF_LINK2))
  116 #define DPRINTF(sc, m, fmt, ...) do {                           \
  117         if (sc->malo_debug & (m))                               \
  118                 printf(fmt, __VA_ARGS__);                       \
  119 } while (0)
  120 #else
  121 #define DPRINTF(sc, m, fmt, ...) do {                           \
  122         (void) sc;                                              \
  123 } while (0)
  124 #endif
  125 
  126 static MALLOC_DEFINE(M_MALODEV, "malodev", "malo driver dma buffers");
  127 
  128 static struct ieee80211vap *malo_vap_create(struct ieee80211com *,
  129                     const char [IFNAMSIZ], int, enum ieee80211_opmode, int,
  130                     const uint8_t [IEEE80211_ADDR_LEN],
  131                     const uint8_t [IEEE80211_ADDR_LEN]);
  132 static  void    malo_vap_delete(struct ieee80211vap *);
  133 static  int     malo_dma_setup(struct malo_softc *);
  134 static  int     malo_setup_hwdma(struct malo_softc *);
  135 static  void    malo_txq_init(struct malo_softc *, struct malo_txq *, int);
  136 static  void    malo_tx_cleanupq(struct malo_softc *, struct malo_txq *);
  137 static  void    malo_start(struct ifnet *);
  138 static  void    malo_watchdog(void *);
  139 static  int     malo_ioctl(struct ifnet *, u_long, caddr_t);
  140 static  void    malo_updateslot(struct ifnet *);
  141 static  int     malo_newstate(struct ieee80211vap *, enum ieee80211_state, int);
  142 static  void    malo_scan_start(struct ieee80211com *);
  143 static  void    malo_scan_end(struct ieee80211com *);
  144 static  void    malo_set_channel(struct ieee80211com *);
  145 static  int     malo_raw_xmit(struct ieee80211_node *, struct mbuf *,
  146                     const struct ieee80211_bpf_params *);
  147 static  void    malo_sysctlattach(struct malo_softc *);
  148 static  void    malo_announce(struct malo_softc *);
  149 static  void    malo_dma_cleanup(struct malo_softc *);
  150 static  void    malo_stop_locked(struct ifnet *, int);
  151 static  int     malo_chan_set(struct malo_softc *, struct ieee80211_channel *);
  152 static  int     malo_mode_init(struct malo_softc *);
  153 static  void    malo_tx_proc(void *, int);
  154 static  void    malo_rx_proc(void *, int);
  155 static  void    malo_init(void *);
  156 
  157 /*
  158  * Read/Write shorthands for accesses to BAR 0.  Note that all BAR 1
  159  * operations are done in the "hal" except getting H/W MAC address at
  160  * malo_attach and there should be no reference to them here.
  161  */
  162 static uint32_t
  163 malo_bar0_read4(struct malo_softc *sc, bus_size_t off)
  164 {
  165         return bus_space_read_4(sc->malo_io0t, sc->malo_io0h, off);
  166 }
  167 
  168 static void
  169 malo_bar0_write4(struct malo_softc *sc, bus_size_t off, uint32_t val)
  170 {
  171         DPRINTF(sc, MALO_DEBUG_FW, "%s: off 0x%jx val 0x%x\n",
  172             __func__, (uintmax_t)off, val);
  173 
  174         bus_space_write_4(sc->malo_io0t, sc->malo_io0h, off, val);
  175 }
  176 
  177 int
  178 malo_attach(uint16_t devid, struct malo_softc *sc)
  179 {
  180         int error;
  181         struct ieee80211com *ic;
  182         struct ifnet *ifp;
  183         struct malo_hal *mh;
  184         uint8_t bands;
  185 
  186         ifp = sc->malo_ifp = if_alloc(IFT_IEEE80211);
  187         if (ifp == NULL) {
  188                 device_printf(sc->malo_dev, "can not if_alloc()\n");
  189                 return ENOSPC;
  190         }
  191         ic = ifp->if_l2com;
  192 
  193         MALO_LOCK_INIT(sc);
  194         callout_init_mtx(&sc->malo_watchdog_timer, &sc->malo_mtx, 0);
  195 
  196         /* set these up early for if_printf use */
  197         if_initname(ifp, device_get_name(sc->malo_dev),
  198             device_get_unit(sc->malo_dev));
  199 
  200         mh = malo_hal_attach(sc->malo_dev, devid,
  201             sc->malo_io1h, sc->malo_io1t, sc->malo_dmat);
  202         if (mh == NULL) {
  203                 if_printf(ifp, "unable to attach HAL\n");
  204                 error = EIO;
  205                 goto bad;
  206         }
  207         sc->malo_mh = mh;
  208 
  209         /*
  210          * Load firmware so we can get setup.  We arbitrarily pick station
  211          * firmware; we'll re-load firmware as needed so setting up
  212          * the wrong mode isn't a big deal.
  213          */
  214         error = malo_hal_fwload(mh, "malo8335-h", "malo8335-m");
  215         if (error != 0) {
  216                 if_printf(ifp, "unable to setup firmware\n");
  217                 goto bad1;
  218         }
  219         /* XXX gethwspecs() extracts correct informations?  not maybe!  */
  220         error = malo_hal_gethwspecs(mh, &sc->malo_hwspecs);
  221         if (error != 0) {
  222                 if_printf(ifp, "unable to fetch h/w specs\n");
  223                 goto bad1;
  224         }
  225 
  226         DPRINTF(sc, MALO_DEBUG_FW,
  227             "malo_hal_gethwspecs: hwversion 0x%x hostif 0x%x"
  228             "maxnum_wcb 0x%x maxnum_mcaddr 0x%x maxnum_tx_wcb 0x%x"
  229             "regioncode 0x%x num_antenna 0x%x fw_releasenum 0x%x"
  230             "wcbbase0 0x%x rxdesc_read 0x%x rxdesc_write 0x%x"
  231             "ul_fw_awakecookie 0x%x w[4] = %x %x %x %x",
  232             sc->malo_hwspecs.hwversion,
  233             sc->malo_hwspecs.hostinterface, sc->malo_hwspecs.maxnum_wcb,
  234             sc->malo_hwspecs.maxnum_mcaddr, sc->malo_hwspecs.maxnum_tx_wcb,
  235             sc->malo_hwspecs.regioncode, sc->malo_hwspecs.num_antenna,
  236             sc->malo_hwspecs.fw_releasenum, sc->malo_hwspecs.wcbbase0,
  237             sc->malo_hwspecs.rxdesc_read, sc->malo_hwspecs.rxdesc_write,
  238             sc->malo_hwspecs.ul_fw_awakecookie,
  239             sc->malo_hwspecs.wcbbase[0], sc->malo_hwspecs.wcbbase[1],
  240             sc->malo_hwspecs.wcbbase[2], sc->malo_hwspecs.wcbbase[3]);
  241 
  242         /* NB: firmware looks that it does not export regdomain info API.  */
  243         bands = 0;
  244         setbit(&bands, IEEE80211_MODE_11B);
  245         setbit(&bands, IEEE80211_MODE_11G);
  246         ieee80211_init_channels(ic, NULL, &bands);
  247 
  248         sc->malo_txantenna = 0x2;       /* h/w default */
  249         sc->malo_rxantenna = 0xffff;    /* h/w default */
  250 
  251         /*
  252          * Allocate tx + rx descriptors and populate the lists.
  253          * We immediately push the information to the firmware
  254          * as otherwise it gets upset.
  255          */
  256         error = malo_dma_setup(sc);
  257         if (error != 0) {
  258                 if_printf(ifp, "failed to setup descriptors: %d\n", error);
  259                 goto bad1;
  260         }
  261         error = malo_setup_hwdma(sc);   /* push to firmware */
  262         if (error != 0)                 /* NB: malo_setupdma prints msg */
  263                 goto bad2;
  264 
  265         sc->malo_tq = taskqueue_create_fast("malo_taskq", M_NOWAIT,
  266                 taskqueue_thread_enqueue, &sc->malo_tq);
  267         taskqueue_start_threads(&sc->malo_tq, 1, PI_NET,
  268                 "%s taskq", ifp->if_xname);
  269 
  270         TASK_INIT(&sc->malo_rxtask, 0, malo_rx_proc, sc);
  271         TASK_INIT(&sc->malo_txtask, 0, malo_tx_proc, sc);
  272 
  273         ifp->if_softc = sc;
  274         ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST;
  275         ifp->if_start = malo_start;
  276         ifp->if_ioctl = malo_ioctl;
  277         ifp->if_init = malo_init;
  278         IFQ_SET_MAXLEN(&ifp->if_snd, ifqmaxlen);
  279         ifp->if_snd.ifq_drv_maxlen = ifqmaxlen;
  280         IFQ_SET_READY(&ifp->if_snd);
  281 
  282         ic->ic_ifp = ifp;
  283         /* XXX not right but it's not used anywhere important */
  284         ic->ic_phytype = IEEE80211_T_OFDM;
  285         ic->ic_opmode = IEEE80211_M_STA;
  286         ic->ic_caps =
  287               IEEE80211_C_STA                   /* station mode supported */
  288             | IEEE80211_C_BGSCAN                /* capable of bg scanning */
  289             | IEEE80211_C_MONITOR               /* monitor mode */
  290             | IEEE80211_C_SHPREAMBLE            /* short preamble supported */
  291             | IEEE80211_C_SHSLOT                /* short slot time supported */
  292             | IEEE80211_C_TXPMGT                /* capable of txpow mgt */
  293             | IEEE80211_C_WPA                   /* capable of WPA1+WPA2 */
  294             ;
  295 
  296         /*
  297          * Transmit requires space in the packet for a special format transmit
  298          * record and optional padding between this record and the payload.
  299          * Ask the net80211 layer to arrange this when encapsulating
  300          * packets so we can add it efficiently. 
  301          */
  302         ic->ic_headroom = sizeof(struct malo_txrec) -
  303                 sizeof(struct ieee80211_frame);
  304 
  305         /* call MI attach routine. */
  306         ieee80211_ifattach(ic, sc->malo_hwspecs.macaddr);
  307         /* override default methods */
  308         ic->ic_vap_create = malo_vap_create;
  309         ic->ic_vap_delete = malo_vap_delete;
  310         ic->ic_raw_xmit = malo_raw_xmit;
  311         ic->ic_updateslot = malo_updateslot;
  312 
  313         ic->ic_scan_start = malo_scan_start;
  314         ic->ic_scan_end = malo_scan_end;
  315         ic->ic_set_channel = malo_set_channel;
  316 
  317         sc->malo_invalid = 0;           /* ready to go, enable int handling */
  318 
  319         ieee80211_radiotap_attach(ic,
  320             &sc->malo_tx_th.wt_ihdr, sizeof(sc->malo_tx_th),
  321                 MALO_TX_RADIOTAP_PRESENT,
  322             &sc->malo_rx_th.wr_ihdr, sizeof(sc->malo_rx_th),
  323                 MALO_RX_RADIOTAP_PRESENT);
  324 
  325         /*
  326          * Setup dynamic sysctl's.
  327          */
  328         malo_sysctlattach(sc);
  329 
  330         if (bootverbose)
  331                 ieee80211_announce(ic);
  332         malo_announce(sc);
  333 
  334         return 0;
  335 bad2:
  336         malo_dma_cleanup(sc);
  337 bad1:
  338         malo_hal_detach(mh);
  339 bad:
  340         if_free(ifp);
  341         sc->malo_invalid = 1;
  342 
  343         return error;
  344 }
  345 
  346 static struct ieee80211vap *
  347 malo_vap_create(struct ieee80211com *ic, const char name[IFNAMSIZ], int unit,
  348     enum ieee80211_opmode opmode, int flags,
  349     const uint8_t bssid[IEEE80211_ADDR_LEN],
  350     const uint8_t mac[IEEE80211_ADDR_LEN])
  351 {
  352         struct ifnet *ifp = ic->ic_ifp;
  353         struct malo_vap *mvp;
  354         struct ieee80211vap *vap;
  355 
  356         if (!TAILQ_EMPTY(&ic->ic_vaps)) {
  357                 if_printf(ifp, "multiple vaps not supported\n");
  358                 return NULL;
  359         }
  360         switch (opmode) {
  361         case IEEE80211_M_STA:
  362                 if (opmode == IEEE80211_M_STA)
  363                         flags |= IEEE80211_CLONE_NOBEACONS;
  364                 /* fall thru... */
  365         case IEEE80211_M_MONITOR:
  366                 break;
  367         default:
  368                 if_printf(ifp, "%s mode not supported\n",
  369                     ieee80211_opmode_name[opmode]);
  370                 return NULL;            /* unsupported */
  371         }
  372         mvp = (struct malo_vap *) malloc(sizeof(struct malo_vap),
  373             M_80211_VAP, M_NOWAIT | M_ZERO);
  374         if (mvp == NULL) {
  375                 if_printf(ifp, "cannot allocate vap state block\n");
  376                 return NULL;
  377         }
  378         vap = &mvp->malo_vap;
  379         ieee80211_vap_setup(ic, vap, name, unit, opmode, flags, bssid, mac);
  380 
  381         /* override state transition machine */
  382         mvp->malo_newstate = vap->iv_newstate;
  383         vap->iv_newstate = malo_newstate;
  384 
  385         /* complete setup */
  386         ieee80211_vap_attach(vap,
  387             ieee80211_media_change, ieee80211_media_status);
  388         ic->ic_opmode = opmode;
  389         return vap;
  390 }
  391 
  392 static void
  393 malo_vap_delete(struct ieee80211vap *vap)
  394 {
  395         struct malo_vap *mvp = MALO_VAP(vap);
  396 
  397         ieee80211_vap_detach(vap);
  398         free(mvp, M_80211_VAP);
  399 }
  400 
  401 int
  402 malo_intr(void *arg)
  403 {
  404         struct malo_softc *sc = arg;
  405         struct malo_hal *mh = sc->malo_mh;
  406         uint32_t status;
  407 
  408         if (sc->malo_invalid) {
  409                 /*
  410                  * The hardware is not ready/present, don't touch anything.
  411                  * Note this can happen early on if the IRQ is shared.
  412                  */
  413                 DPRINTF(sc, MALO_DEBUG_ANY, "%s: invalid; ignored\n", __func__);
  414                 return (FILTER_STRAY);
  415         }
  416 
  417         /*
  418          * Figure out the reason(s) for the interrupt.
  419          */
  420         malo_hal_getisr(mh, &status);           /* NB: clears ISR too */
  421         if (status == 0)                        /* must be a shared irq */
  422                 return (FILTER_STRAY);
  423 
  424         DPRINTF(sc, MALO_DEBUG_INTR, "%s: status 0x%x imask 0x%x\n",
  425             __func__, status, sc->malo_imask);
  426 
  427         if (status & MALO_A2HRIC_BIT_RX_RDY)
  428                 taskqueue_enqueue_fast(sc->malo_tq, &sc->malo_rxtask);
  429         if (status & MALO_A2HRIC_BIT_TX_DONE)
  430                 taskqueue_enqueue_fast(sc->malo_tq, &sc->malo_txtask);
  431         if (status & MALO_A2HRIC_BIT_OPC_DONE)
  432                 malo_hal_cmddone(mh);
  433         if (status & MALO_A2HRIC_BIT_MAC_EVENT)
  434                 ;
  435         if (status & MALO_A2HRIC_BIT_RX_PROBLEM)
  436                 ;
  437         if (status & MALO_A2HRIC_BIT_ICV_ERROR) {
  438                 /* TKIP ICV error */
  439                 sc->malo_stats.mst_rx_badtkipicv++;
  440         }
  441 #ifdef MALO_DEBUG
  442         if (((status | sc->malo_imask) ^ sc->malo_imask) != 0)
  443                 DPRINTF(sc, MALO_DEBUG_INTR,
  444                     "%s: can't handle interrupt status 0x%x\n",
  445                     __func__, status);
  446 #endif
  447         return (FILTER_HANDLED);
  448 }
  449 
  450 static void
  451 malo_load_cb(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
  452 {
  453         bus_addr_t *paddr = (bus_addr_t*) arg;
  454 
  455         KASSERT(error == 0, ("error %u on bus_dma callback", error));
  456 
  457         *paddr = segs->ds_addr;
  458 }
  459 
  460 static int
  461 malo_desc_setup(struct malo_softc *sc, const char *name,
  462     struct malo_descdma *dd,
  463     int nbuf, size_t bufsize, int ndesc, size_t descsize)
  464 {
  465         int error;
  466         struct ifnet *ifp = sc->malo_ifp;
  467         uint8_t *ds;
  468 
  469         DPRINTF(sc, MALO_DEBUG_RESET,
  470             "%s: %s DMA: %u bufs (%ju) %u desc/buf (%ju)\n",
  471             __func__, name, nbuf, (uintmax_t) bufsize,
  472             ndesc, (uintmax_t) descsize);
  473         
  474         dd->dd_name = name;
  475         dd->dd_desc_len = nbuf * ndesc * descsize;
  476 
  477         /*
  478          * Setup DMA descriptor area.
  479          */
  480         error = bus_dma_tag_create(bus_get_dma_tag(sc->malo_dev),/* parent */
  481                        PAGE_SIZE, 0,            /* alignment, bounds */
  482                        BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
  483                        BUS_SPACE_MAXADDR,       /* highaddr */
  484                        NULL, NULL,              /* filter, filterarg */
  485                        dd->dd_desc_len,         /* maxsize */
  486                        1,                       /* nsegments */
  487                        dd->dd_desc_len,         /* maxsegsize */
  488                        BUS_DMA_ALLOCNOW,        /* flags */
  489                        NULL,                    /* lockfunc */
  490                        NULL,                    /* lockarg */
  491                        &dd->dd_dmat);
  492         if (error != 0) {
  493                 if_printf(ifp, "cannot allocate %s DMA tag\n", dd->dd_name);
  494                 return error;
  495         }
  496         
  497         /* allocate descriptors */
  498         error = bus_dmamap_create(dd->dd_dmat, BUS_DMA_NOWAIT, &dd->dd_dmamap);
  499         if (error != 0) {
  500                 if_printf(ifp, "unable to create dmamap for %s descriptors, "
  501                     "error %u\n", dd->dd_name, error);
  502                 goto fail0;
  503         }
  504         
  505         error = bus_dmamem_alloc(dd->dd_dmat, (void**) &dd->dd_desc,
  506             BUS_DMA_NOWAIT | BUS_DMA_COHERENT, &dd->dd_dmamap);
  507         if (error != 0) {
  508                 if_printf(ifp, "unable to alloc memory for %u %s descriptors, "
  509                     "error %u\n", nbuf * ndesc, dd->dd_name, error);
  510                 goto fail1;
  511         }
  512 
  513         error = bus_dmamap_load(dd->dd_dmat, dd->dd_dmamap,
  514             dd->dd_desc, dd->dd_desc_len,
  515             malo_load_cb, &dd->dd_desc_paddr, BUS_DMA_NOWAIT);
  516         if (error != 0) {
  517                 if_printf(ifp, "unable to map %s descriptors, error %u\n",
  518                     dd->dd_name, error);
  519                 goto fail2;
  520         }
  521         
  522         ds = dd->dd_desc;
  523         memset(ds, 0, dd->dd_desc_len);
  524         DPRINTF(sc, MALO_DEBUG_RESET,
  525             "%s: %s DMA map: %p (%lu) -> 0x%jx (%lu)\n",
  526             __func__, dd->dd_name, ds, (u_long) dd->dd_desc_len,
  527             (uintmax_t) dd->dd_desc_paddr, /*XXX*/ (u_long) dd->dd_desc_len);
  528 
  529         return 0;
  530 fail2:
  531         bus_dmamem_free(dd->dd_dmat, dd->dd_desc, dd->dd_dmamap);
  532 fail1:
  533         bus_dmamap_destroy(dd->dd_dmat, dd->dd_dmamap);
  534 fail0:
  535         bus_dma_tag_destroy(dd->dd_dmat);
  536         memset(dd, 0, sizeof(*dd));
  537         return error;
  538 }
  539 
  540 #define DS2PHYS(_dd, _ds) \
  541         ((_dd)->dd_desc_paddr + ((caddr_t)(_ds) - (caddr_t)(_dd)->dd_desc))
  542 
  543 static int
  544 malo_rxdma_setup(struct malo_softc *sc)
  545 {
  546         struct ifnet *ifp = sc->malo_ifp;
  547         int error, bsize, i;
  548         struct malo_rxbuf *bf;
  549         struct malo_rxdesc *ds;
  550 
  551         error = malo_desc_setup(sc, "rx", &sc->malo_rxdma,
  552             malo_rxbuf, sizeof(struct malo_rxbuf),
  553             1, sizeof(struct malo_rxdesc));
  554         if (error != 0)
  555                 return error;
  556 
  557         /*
  558          * Allocate rx buffers and set them up.
  559          */
  560         bsize = malo_rxbuf * sizeof(struct malo_rxbuf);
  561         bf = malloc(bsize, M_MALODEV, M_NOWAIT | M_ZERO);
  562         if (bf == NULL) {
  563                 if_printf(ifp, "malloc of %u rx buffers failed\n", bsize);
  564                 return error;
  565         }
  566         sc->malo_rxdma.dd_bufptr = bf;
  567         
  568         STAILQ_INIT(&sc->malo_rxbuf);
  569         ds = sc->malo_rxdma.dd_desc;
  570         for (i = 0; i < malo_rxbuf; i++, bf++, ds++) {
  571                 bf->bf_desc = ds;
  572                 bf->bf_daddr = DS2PHYS(&sc->malo_rxdma, ds);
  573                 error = bus_dmamap_create(sc->malo_dmat, BUS_DMA_NOWAIT,
  574                     &bf->bf_dmamap);
  575                 if (error != 0) {
  576                         if_printf(ifp, "%s: unable to dmamap for rx buffer, "
  577                             "error %d\n", __func__, error);
  578                         return error;
  579                 }
  580                 /* NB: tail is intentional to preserve descriptor order */
  581                 STAILQ_INSERT_TAIL(&sc->malo_rxbuf, bf, bf_list);
  582         }
  583         return 0;
  584 }
  585 
  586 static int
  587 malo_txdma_setup(struct malo_softc *sc, struct malo_txq *txq)
  588 {
  589         struct ifnet *ifp = sc->malo_ifp;
  590         int error, bsize, i;
  591         struct malo_txbuf *bf;
  592         struct malo_txdesc *ds;
  593 
  594         error = malo_desc_setup(sc, "tx", &txq->dma,
  595             malo_txbuf, sizeof(struct malo_txbuf),
  596             MALO_TXDESC, sizeof(struct malo_txdesc));
  597         if (error != 0)
  598                 return error;
  599         
  600         /* allocate and setup tx buffers */
  601         bsize = malo_txbuf * sizeof(struct malo_txbuf);
  602         bf = malloc(bsize, M_MALODEV, M_NOWAIT | M_ZERO);
  603         if (bf == NULL) {
  604                 if_printf(ifp, "malloc of %u tx buffers failed\n",
  605                     malo_txbuf);
  606                 return ENOMEM;
  607         }
  608         txq->dma.dd_bufptr = bf;
  609         
  610         STAILQ_INIT(&txq->free);
  611         txq->nfree = 0;
  612         ds = txq->dma.dd_desc;
  613         for (i = 0; i < malo_txbuf; i++, bf++, ds += MALO_TXDESC) {
  614                 bf->bf_desc = ds;
  615                 bf->bf_daddr = DS2PHYS(&txq->dma, ds);
  616                 error = bus_dmamap_create(sc->malo_dmat, BUS_DMA_NOWAIT,
  617                     &bf->bf_dmamap);
  618                 if (error != 0) {
  619                         if_printf(ifp, "unable to create dmamap for tx "
  620                             "buffer %u, error %u\n", i, error);
  621                         return error;
  622                 }
  623                 STAILQ_INSERT_TAIL(&txq->free, bf, bf_list);
  624                 txq->nfree++;
  625         }
  626 
  627         return 0;
  628 }
  629 
  630 static void
  631 malo_desc_cleanup(struct malo_softc *sc, struct malo_descdma *dd)
  632 {
  633         bus_dmamap_unload(dd->dd_dmat, dd->dd_dmamap);
  634         bus_dmamem_free(dd->dd_dmat, dd->dd_desc, dd->dd_dmamap);
  635         bus_dmamap_destroy(dd->dd_dmat, dd->dd_dmamap);
  636         bus_dma_tag_destroy(dd->dd_dmat);
  637 
  638         memset(dd, 0, sizeof(*dd));
  639 }
  640 
  641 static void
  642 malo_rxdma_cleanup(struct malo_softc *sc)
  643 {
  644         struct malo_rxbuf *bf;
  645 
  646         STAILQ_FOREACH(bf, &sc->malo_rxbuf, bf_list) {
  647                 if (bf->bf_m != NULL) {
  648                         m_freem(bf->bf_m);
  649                         bf->bf_m = NULL;
  650                 }
  651                 if (bf->bf_dmamap != NULL) {
  652                         bus_dmamap_destroy(sc->malo_dmat, bf->bf_dmamap);
  653                         bf->bf_dmamap = NULL;
  654                 }
  655         }
  656         STAILQ_INIT(&sc->malo_rxbuf);
  657         if (sc->malo_rxdma.dd_bufptr != NULL) {
  658                 free(sc->malo_rxdma.dd_bufptr, M_MALODEV);
  659                 sc->malo_rxdma.dd_bufptr = NULL;
  660         }
  661         if (sc->malo_rxdma.dd_desc_len != 0)
  662                 malo_desc_cleanup(sc, &sc->malo_rxdma);
  663 }
  664 
  665 static void
  666 malo_txdma_cleanup(struct malo_softc *sc, struct malo_txq *txq)
  667 {
  668         struct malo_txbuf *bf;
  669         struct ieee80211_node *ni;
  670 
  671         STAILQ_FOREACH(bf, &txq->free, bf_list) {
  672                 if (bf->bf_m != NULL) {
  673                         m_freem(bf->bf_m);
  674                         bf->bf_m = NULL;
  675                 }
  676                 ni = bf->bf_node;
  677                 bf->bf_node = NULL;
  678                 if (ni != NULL) {
  679                         /*
  680                          * Reclaim node reference.
  681                          */
  682                         ieee80211_free_node(ni);
  683                 }
  684                 if (bf->bf_dmamap != NULL) {
  685                         bus_dmamap_destroy(sc->malo_dmat, bf->bf_dmamap);
  686                         bf->bf_dmamap = NULL;
  687                 }
  688         }
  689         STAILQ_INIT(&txq->free);
  690         txq->nfree = 0;
  691         if (txq->dma.dd_bufptr != NULL) {
  692                 free(txq->dma.dd_bufptr, M_MALODEV);
  693                 txq->dma.dd_bufptr = NULL;
  694         }
  695         if (txq->dma.dd_desc_len != 0)
  696                 malo_desc_cleanup(sc, &txq->dma);
  697 }
  698 
  699 static void
  700 malo_dma_cleanup(struct malo_softc *sc)
  701 {
  702         int i;
  703 
  704         for (i = 0; i < MALO_NUM_TX_QUEUES; i++)
  705                 malo_txdma_cleanup(sc, &sc->malo_txq[i]);
  706 
  707         malo_rxdma_cleanup(sc);
  708 }
  709 
  710 static int
  711 malo_dma_setup(struct malo_softc *sc)
  712 {
  713         int error, i;
  714 
  715         /* rxdma initializing.  */
  716         error = malo_rxdma_setup(sc);
  717         if (error != 0)
  718                 return error;
  719 
  720         /* NB: we just have 1 tx queue now.  */
  721         for (i = 0; i < MALO_NUM_TX_QUEUES; i++) {
  722                 error = malo_txdma_setup(sc, &sc->malo_txq[i]);
  723                 if (error != 0) {
  724                         malo_dma_cleanup(sc);
  725 
  726                         return error;
  727                 }
  728 
  729                 malo_txq_init(sc, &sc->malo_txq[i], i);
  730         }
  731 
  732         return 0;
  733 }
  734 
  735 static void
  736 malo_hal_set_rxtxdma(struct malo_softc *sc)
  737 {
  738         int i;
  739 
  740         malo_bar0_write4(sc, sc->malo_hwspecs.rxdesc_read,
  741             sc->malo_hwdma.rxdesc_read);
  742         malo_bar0_write4(sc, sc->malo_hwspecs.rxdesc_write,
  743             sc->malo_hwdma.rxdesc_read);
  744 
  745         for (i = 0; i < MALO_NUM_TX_QUEUES; i++) {
  746                 malo_bar0_write4(sc,
  747                     sc->malo_hwspecs.wcbbase[i], sc->malo_hwdma.wcbbase[i]);
  748         }
  749 }
  750 
  751 /*
  752  * Inform firmware of our tx/rx dma setup.  The BAR 0 writes below are
  753  * for compatibility with older firmware.  For current firmware we send
  754  * this information with a cmd block via malo_hal_sethwdma.
  755  */
  756 static int
  757 malo_setup_hwdma(struct malo_softc *sc)
  758 {
  759         int i;
  760         struct malo_txq *txq;
  761 
  762         sc->malo_hwdma.rxdesc_read = sc->malo_rxdma.dd_desc_paddr;
  763 
  764         for (i = 0; i < MALO_NUM_TX_QUEUES; i++) {
  765                 txq = &sc->malo_txq[i];
  766                 sc->malo_hwdma.wcbbase[i] = txq->dma.dd_desc_paddr;
  767         }
  768         sc->malo_hwdma.maxnum_txwcb = malo_txbuf;
  769         sc->malo_hwdma.maxnum_wcb = MALO_NUM_TX_QUEUES;
  770 
  771         malo_hal_set_rxtxdma(sc);
  772 
  773         return 0;
  774 }
  775 
  776 static void
  777 malo_txq_init(struct malo_softc *sc, struct malo_txq *txq, int qnum)
  778 {
  779         struct malo_txbuf *bf, *bn;
  780         struct malo_txdesc *ds;
  781 
  782         MALO_TXQ_LOCK_INIT(sc, txq);
  783         txq->qnum = qnum;
  784         txq->txpri = 0; /* XXX */
  785 
  786         STAILQ_FOREACH(bf, &txq->free, bf_list) {
  787                 bf->bf_txq = txq;
  788 
  789                 ds = bf->bf_desc;
  790                 bn = STAILQ_NEXT(bf, bf_list);
  791                 if (bn == NULL)
  792                         bn = STAILQ_FIRST(&txq->free);
  793                 ds->physnext = htole32(bn->bf_daddr);
  794         }
  795         STAILQ_INIT(&txq->active);
  796 }
  797 
  798 /*
  799  * Reclaim resources for a setup queue.
  800  */
  801 static void
  802 malo_tx_cleanupq(struct malo_softc *sc, struct malo_txq *txq)
  803 {
  804         /* XXX hal work? */
  805         MALO_TXQ_LOCK_DESTROY(txq);
  806 }
  807 
  808 /*
  809  * Allocate a tx buffer for sending a frame.
  810  */
  811 static struct malo_txbuf *
  812 malo_getbuf(struct malo_softc *sc, struct malo_txq *txq)
  813 {
  814         struct malo_txbuf *bf;
  815 
  816         MALO_TXQ_LOCK(txq);
  817         bf = STAILQ_FIRST(&txq->free);
  818         if (bf != NULL) {
  819                 STAILQ_REMOVE_HEAD(&txq->free, bf_list);
  820                 txq->nfree--;
  821         }
  822         MALO_TXQ_UNLOCK(txq);
  823         if (bf == NULL) {
  824                 DPRINTF(sc, MALO_DEBUG_XMIT,
  825                     "%s: out of xmit buffers on q %d\n", __func__, txq->qnum);
  826                 sc->malo_stats.mst_tx_qstop++;
  827         }
  828         return bf;
  829 }
  830 
  831 static int
  832 malo_tx_dmasetup(struct malo_softc *sc, struct malo_txbuf *bf, struct mbuf *m0)
  833 {
  834         struct mbuf *m;
  835         int error;
  836 
  837         /*
  838          * Load the DMA map so any coalescing is done.  This also calculates
  839          * the number of descriptors we need.
  840          */
  841         error = bus_dmamap_load_mbuf_sg(sc->malo_dmat, bf->bf_dmamap, m0,
  842                                      bf->bf_segs, &bf->bf_nseg,
  843                                      BUS_DMA_NOWAIT);
  844         if (error == EFBIG) {
  845                 /* XXX packet requires too many descriptors */
  846                 bf->bf_nseg = MALO_TXDESC + 1;
  847         } else if (error != 0) {
  848                 sc->malo_stats.mst_tx_busdma++;
  849                 m_freem(m0);
  850                 return error;
  851         }
  852         /*
  853          * Discard null packets and check for packets that require too many
  854          * TX descriptors.  We try to convert the latter to a cluster.
  855          */
  856         if (error == EFBIG) {           /* too many desc's, linearize */
  857                 sc->malo_stats.mst_tx_linear++;
  858                 m = m_defrag(m0, M_NOWAIT);
  859                 if (m == NULL) {
  860                         m_freem(m0);
  861                         sc->malo_stats.mst_tx_nombuf++;
  862                         return ENOMEM;
  863                 }
  864                 m0 = m;
  865                 error = bus_dmamap_load_mbuf_sg(sc->malo_dmat, bf->bf_dmamap, m0,
  866                                              bf->bf_segs, &bf->bf_nseg,
  867                                              BUS_DMA_NOWAIT);
  868                 if (error != 0) {
  869                         sc->malo_stats.mst_tx_busdma++;
  870                         m_freem(m0);
  871                         return error;
  872                 }
  873                 KASSERT(bf->bf_nseg <= MALO_TXDESC,
  874                     ("too many segments after defrag; nseg %u", bf->bf_nseg));
  875         } else if (bf->bf_nseg == 0) {          /* null packet, discard */
  876                 sc->malo_stats.mst_tx_nodata++;
  877                 m_freem(m0);
  878                 return EIO;
  879         }
  880         DPRINTF(sc, MALO_DEBUG_XMIT, "%s: m %p len %u\n",
  881                 __func__, m0, m0->m_pkthdr.len);
  882         bus_dmamap_sync(sc->malo_dmat, bf->bf_dmamap, BUS_DMASYNC_PREWRITE);
  883         bf->bf_m = m0;
  884 
  885         return 0;
  886 }
  887 
  888 #ifdef MALO_DEBUG
  889 static void
  890 malo_printrxbuf(const struct malo_rxbuf *bf, u_int ix)
  891 {
  892         const struct malo_rxdesc *ds = bf->bf_desc;
  893         uint32_t status = le32toh(ds->status);
  894         
  895         printf("R[%2u] (DS.V:%p DS.P:0x%jx) NEXT:%08x DATA:%08x RC:%02x%s\n"
  896             "      STAT:%02x LEN:%04x SNR:%02x NF:%02x CHAN:%02x"
  897             " RATE:%02x QOS:%04x\n", ix, ds, (uintmax_t)bf->bf_daddr,
  898             le32toh(ds->physnext), le32toh(ds->physbuffdata),
  899             ds->rxcontrol, 
  900             ds->rxcontrol != MALO_RXD_CTRL_DRIVER_OWN ?
  901                 "" : (status & MALO_RXD_STATUS_OK) ? " *" : " !",
  902             ds->status, le16toh(ds->pktlen), ds->snr, ds->nf, ds->channel,
  903             ds->rate, le16toh(ds->qosctrl));
  904 }
  905 
  906 static void
  907 malo_printtxbuf(const struct malo_txbuf *bf, u_int qnum, u_int ix)
  908 {
  909         const struct malo_txdesc *ds = bf->bf_desc;
  910         uint32_t status = le32toh(ds->status);
  911         
  912         printf("Q%u[%3u]", qnum, ix);
  913         printf(" (DS.V:%p DS.P:0x%jx)\n", ds, (uintmax_t)bf->bf_daddr);
  914         printf("    NEXT:%08x DATA:%08x LEN:%04x STAT:%08x%s\n",
  915             le32toh(ds->physnext),
  916             le32toh(ds->pktptr), le16toh(ds->pktlen), status,
  917             status & MALO_TXD_STATUS_USED ?
  918             "" : (status & 3) != 0 ? " *" : " !");
  919         printf("    RATE:%02x PRI:%x QOS:%04x SAP:%08x FORMAT:%04x\n",
  920             ds->datarate, ds->txpriority, le16toh(ds->qosctrl),
  921             le32toh(ds->sap_pktinfo), le16toh(ds->format));
  922 #if 0
  923         {
  924                 const uint8_t *cp = (const uint8_t *) ds;
  925                 int i;
  926                 for (i = 0; i < sizeof(struct malo_txdesc); i++) {
  927                         printf("%02x ", cp[i]);
  928                         if (((i+1) % 16) == 0)
  929                                 printf("\n");
  930                 }
  931                 printf("\n");
  932         }
  933 #endif
  934 }
  935 #endif /* MALO_DEBUG */
  936 
  937 static __inline void
  938 malo_updatetxrate(struct ieee80211_node *ni, int rix)
  939 {
  940 #define N(x)    (sizeof(x)/sizeof(x[0]))
  941         static const int ieeerates[] =
  942             { 2, 4, 11, 22, 44, 12, 18, 24, 36, 48, 96, 108 };
  943         if (rix < N(ieeerates))
  944                 ni->ni_txrate = ieeerates[rix];
  945 #undef N
  946 }
  947 
  948 static int
  949 malo_fix2rate(int fix_rate)
  950 {
  951 #define N(x)    (sizeof(x)/sizeof(x[0]))
  952         static const int rates[] =
  953             { 2, 4, 11, 22, 12, 18, 24, 36, 48, 96, 108 };
  954         return (fix_rate < N(rates) ? rates[fix_rate] : 0);
  955 #undef N
  956 }
  957 
  958 /* idiomatic shorthands: MS = mask+shift, SM = shift+mask */
  959 #define MS(v,x)                 (((v) & x) >> x##_S)
  960 #define SM(v,x)                 (((v) << x##_S) & x)
  961 
  962 /*
  963  * Process completed xmit descriptors from the specified queue.
  964  */
  965 static int
  966 malo_tx_processq(struct malo_softc *sc, struct malo_txq *txq)
  967 {
  968         struct malo_txbuf *bf;
  969         struct malo_txdesc *ds;
  970         struct ieee80211_node *ni;
  971         int nreaped;
  972         uint32_t status;
  973 
  974         DPRINTF(sc, MALO_DEBUG_TX_PROC, "%s: tx queue %u\n",
  975             __func__, txq->qnum);
  976         for (nreaped = 0;; nreaped++) {
  977                 MALO_TXQ_LOCK(txq);
  978                 bf = STAILQ_FIRST(&txq->active);
  979                 if (bf == NULL) {
  980                         MALO_TXQ_UNLOCK(txq);
  981                         break;
  982                 }
  983                 ds = bf->bf_desc;
  984                 MALO_TXDESC_SYNC(txq, ds,
  985                     BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
  986                 if (ds->status & htole32(MALO_TXD_STATUS_FW_OWNED)) {
  987                         MALO_TXQ_UNLOCK(txq);
  988                         break;
  989                 }
  990                 STAILQ_REMOVE_HEAD(&txq->active, bf_list);
  991                 MALO_TXQ_UNLOCK(txq);
  992 
  993 #ifdef MALO_DEBUG
  994                 if (sc->malo_debug & MALO_DEBUG_XMIT_DESC)
  995                         malo_printtxbuf(bf, txq->qnum, nreaped);
  996 #endif
  997                 ni = bf->bf_node;
  998                 if (ni != NULL) {
  999                         status = le32toh(ds->status);
 1000                         if (status & MALO_TXD_STATUS_OK) {
 1001                                 uint16_t format = le16toh(ds->format);
 1002                                 uint8_t txant = MS(format, MALO_TXD_ANTENNA);
 1003 
 1004                                 sc->malo_stats.mst_ant_tx[txant]++;
 1005                                 if (status & MALO_TXD_STATUS_OK_RETRY)
 1006                                         sc->malo_stats.mst_tx_retries++;
 1007                                 if (status & MALO_TXD_STATUS_OK_MORE_RETRY)
 1008                                         sc->malo_stats.mst_tx_mretries++;
 1009                                 malo_updatetxrate(ni, ds->datarate);
 1010                                 sc->malo_stats.mst_tx_rate = ds->datarate;
 1011                         } else {
 1012                                 if (status & MALO_TXD_STATUS_FAILED_LINK_ERROR)
 1013                                         sc->malo_stats.mst_tx_linkerror++;
 1014                                 if (status & MALO_TXD_STATUS_FAILED_XRETRY)
 1015                                         sc->malo_stats.mst_tx_xretries++;
 1016                                 if (status & MALO_TXD_STATUS_FAILED_AGING)
 1017                                         sc->malo_stats.mst_tx_aging++;
 1018                         }
 1019                         /*
 1020                          * Do any tx complete callback.  Note this must
 1021                          * be done before releasing the node reference.
 1022                          * XXX no way to figure out if frame was ACK'd
 1023                          */
 1024                         if (bf->bf_m->m_flags & M_TXCB) {
 1025                                 /* XXX strip fw len in case header inspected */
 1026                                 m_adj(bf->bf_m, sizeof(uint16_t));
 1027                                 ieee80211_process_callback(ni, bf->bf_m,
 1028                                         (status & MALO_TXD_STATUS_OK) == 0);
 1029                         }
 1030                         /*
 1031                          * Reclaim reference to node.
 1032                          *
 1033                          * NB: the node may be reclaimed here if, for example
 1034                          *     this is a DEAUTH message that was sent and the
 1035                          *     node was timed out due to inactivity.
 1036                          */
 1037                         ieee80211_free_node(ni);
 1038                 }
 1039                 ds->status = htole32(MALO_TXD_STATUS_IDLE);
 1040                 ds->pktlen = htole32(0);
 1041 
 1042                 bus_dmamap_sync(sc->malo_dmat, bf->bf_dmamap,
 1043                     BUS_DMASYNC_POSTWRITE);
 1044                 bus_dmamap_unload(sc->malo_dmat, bf->bf_dmamap);
 1045                 m_freem(bf->bf_m);
 1046                 bf->bf_m = NULL;
 1047                 bf->bf_node = NULL;
 1048 
 1049                 MALO_TXQ_LOCK(txq);
 1050                 STAILQ_INSERT_TAIL(&txq->free, bf, bf_list);
 1051                 txq->nfree++;
 1052                 MALO_TXQ_UNLOCK(txq);
 1053         }
 1054         return nreaped;
 1055 }
 1056 
 1057 /*
 1058  * Deferred processing of transmit interrupt.
 1059  */
 1060 static void
 1061 malo_tx_proc(void *arg, int npending)
 1062 {
 1063         struct malo_softc *sc = arg;
 1064         struct ifnet *ifp = sc->malo_ifp;
 1065         int i, nreaped;
 1066 
 1067         /*
 1068          * Process each active queue.
 1069          */
 1070         nreaped = 0;
 1071         for (i = 0; i < MALO_NUM_TX_QUEUES; i++) {
 1072                 if (!STAILQ_EMPTY(&sc->malo_txq[i].active))
 1073                         nreaped += malo_tx_processq(sc, &sc->malo_txq[i]);
 1074         }
 1075 
 1076         if (nreaped != 0) {
 1077                 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
 1078                 sc->malo_timer = 0;
 1079                 malo_start(ifp);
 1080         }
 1081 }
 1082 
 1083 static int
 1084 malo_tx_start(struct malo_softc *sc, struct ieee80211_node *ni,
 1085     struct malo_txbuf *bf, struct mbuf *m0)
 1086 {
 1087 #define IEEE80211_DIR_DSTODS(wh) \
 1088         ((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS)
 1089 #define IS_DATA_FRAME(wh)                                               \
 1090         ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK)) == IEEE80211_FC0_TYPE_DATA)
 1091         int error, ismcast, iswep;
 1092         int copyhdrlen, hdrlen, pktlen;
 1093         struct ieee80211_frame *wh;
 1094         struct ifnet *ifp = sc->malo_ifp;
 1095         struct ieee80211com *ic = ifp->if_l2com;
 1096         struct ieee80211vap *vap = ni->ni_vap;
 1097         struct malo_txdesc *ds;
 1098         struct malo_txrec *tr;
 1099         struct malo_txq *txq;
 1100         uint16_t qos;
 1101 
 1102         wh = mtod(m0, struct ieee80211_frame *);
 1103         iswep = wh->i_fc[1] & IEEE80211_FC1_PROTECTED;
 1104         ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1);
 1105         copyhdrlen = hdrlen = ieee80211_anyhdrsize(wh);
 1106         pktlen = m0->m_pkthdr.len;
 1107         if (IEEE80211_QOS_HAS_SEQ(wh)) {
 1108                 if (IEEE80211_DIR_DSTODS(wh)) {
 1109                         qos = *(uint16_t *)
 1110                             (((struct ieee80211_qosframe_addr4 *) wh)->i_qos);
 1111                         copyhdrlen -= sizeof(qos);
 1112                 } else
 1113                         qos = *(uint16_t *)
 1114                             (((struct ieee80211_qosframe *) wh)->i_qos);
 1115         } else
 1116                 qos = 0;
 1117 
 1118         if (iswep) {
 1119                 struct ieee80211_key *k;
 1120 
 1121                 /*
 1122                  * Construct the 802.11 header+trailer for an encrypted
 1123                  * frame. The only reason this can fail is because of an
 1124                  * unknown or unsupported cipher/key type.
 1125                  *
 1126                  * NB: we do this even though the firmware will ignore
 1127                  *     what we've done for WEP and TKIP as we need the
 1128                  *     ExtIV filled in for CCMP and this also adjusts
 1129                  *     the headers which simplifies our work below.
 1130                  */
 1131                 k = ieee80211_crypto_encap(ni, m0);
 1132                 if (k == NULL) {
 1133                         /*
 1134                          * This can happen when the key is yanked after the
 1135                          * frame was queued.  Just discard the frame; the
 1136                          * 802.11 layer counts failures and provides
 1137                          * debugging/diagnostics.
 1138                          */
 1139                         m_freem(m0);
 1140                         return EIO;
 1141                 }
 1142 
 1143                 /*
 1144                  * Adjust the packet length for the crypto additions
 1145                  * done during encap and any other bits that the f/w
 1146                  * will add later on.
 1147                  */
 1148                 pktlen = m0->m_pkthdr.len;
 1149 
 1150                 /* packet header may have moved, reset our local pointer */
 1151                 wh = mtod(m0, struct ieee80211_frame *);
 1152         }
 1153 
 1154         if (ieee80211_radiotap_active_vap(vap)) {
 1155                 sc->malo_tx_th.wt_flags = 0;    /* XXX */
 1156                 if (iswep)
 1157                         sc->malo_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP;
 1158                 sc->malo_tx_th.wt_txpower = ni->ni_txpower;
 1159                 sc->malo_tx_th.wt_antenna = sc->malo_txantenna;
 1160 
 1161                 ieee80211_radiotap_tx(vap, m0);
 1162         }
 1163 
 1164         /*
 1165          * Copy up/down the 802.11 header; the firmware requires
 1166          * we present a 2-byte payload length followed by a
 1167          * 4-address header (w/o QoS), followed (optionally) by
 1168          * any WEP/ExtIV header (but only filled in for CCMP).
 1169          * We are assured the mbuf has sufficient headroom to
 1170          * prepend in-place by the setup of ic_headroom in
 1171          * malo_attach.
 1172          */
 1173         if (hdrlen < sizeof(struct malo_txrec)) {
 1174                 const int space = sizeof(struct malo_txrec) - hdrlen;
 1175                 if (M_LEADINGSPACE(m0) < space) {
 1176                         /* NB: should never happen */
 1177                         device_printf(sc->malo_dev,
 1178                             "not enough headroom, need %d found %zd, "
 1179                             "m_flags 0x%x m_len %d\n",
 1180                             space, M_LEADINGSPACE(m0), m0->m_flags, m0->m_len);
 1181                         ieee80211_dump_pkt(ic,
 1182                             mtod(m0, const uint8_t *), m0->m_len, 0, -1);
 1183                         m_freem(m0);
 1184                         /* XXX stat */
 1185                         return EIO;
 1186                 }
 1187                 M_PREPEND(m0, space, M_NOWAIT);
 1188         }
 1189         tr = mtod(m0, struct malo_txrec *);
 1190         if (wh != (struct ieee80211_frame *) &tr->wh)
 1191                 ovbcopy(wh, &tr->wh, hdrlen);
 1192         /*
 1193          * Note: the "firmware length" is actually the length of the fully
 1194          * formed "802.11 payload".  That is, it's everything except for
 1195          * the 802.11 header.  In particular this includes all crypto
 1196          * material including the MIC!
 1197          */
 1198         tr->fwlen = htole16(pktlen - hdrlen);
 1199 
 1200         /*
 1201          * Load the DMA map so any coalescing is done.  This
 1202          * also calculates the number of descriptors we need.
 1203          */
 1204         error = malo_tx_dmasetup(sc, bf, m0);
 1205         if (error != 0)
 1206                 return error;
 1207         bf->bf_node = ni;                       /* NB: held reference */
 1208         m0 = bf->bf_m;                          /* NB: may have changed */
 1209         tr = mtod(m0, struct malo_txrec *);
 1210         wh = (struct ieee80211_frame *)&tr->wh;
 1211 
 1212         /*
 1213          * Formulate tx descriptor.
 1214          */
 1215         ds = bf->bf_desc;
 1216         txq = bf->bf_txq;
 1217 
 1218         ds->qosctrl = qos;                      /* NB: already little-endian */
 1219         ds->pktptr = htole32(bf->bf_segs[0].ds_addr);
 1220         ds->pktlen = htole16(bf->bf_segs[0].ds_len);
 1221         /* NB: pPhysNext setup once, don't touch */
 1222         ds->datarate = IS_DATA_FRAME(wh) ? 1 : 0;
 1223         ds->sap_pktinfo = 0;
 1224         ds->format = 0;
 1225 
 1226         /*
 1227          * Select transmit rate.
 1228          */
 1229         switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) {
 1230         case IEEE80211_FC0_TYPE_MGT:
 1231                 sc->malo_stats.mst_tx_mgmt++;
 1232                 /* fall thru... */
 1233         case IEEE80211_FC0_TYPE_CTL:
 1234                 ds->txpriority = 1;
 1235                 break;
 1236         case IEEE80211_FC0_TYPE_DATA:
 1237                 ds->txpriority = txq->qnum;
 1238                 break;
 1239         default:
 1240                 if_printf(ifp, "bogus frame type 0x%x (%s)\n",
 1241                         wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK, __func__);
 1242                 /* XXX statistic */
 1243                 m_freem(m0);
 1244                 return EIO;
 1245         }
 1246 
 1247 #ifdef MALO_DEBUG
 1248         if (IFF_DUMPPKTS_XMIT(sc))
 1249                 ieee80211_dump_pkt(ic,
 1250                     mtod(m0, const uint8_t *)+sizeof(uint16_t),
 1251                     m0->m_len - sizeof(uint16_t), ds->datarate, -1);
 1252 #endif
 1253 
 1254         MALO_TXQ_LOCK(txq);
 1255         if (!IS_DATA_FRAME(wh))
 1256                 ds->status |= htole32(1);
 1257         ds->status |= htole32(MALO_TXD_STATUS_FW_OWNED);
 1258         STAILQ_INSERT_TAIL(&txq->active, bf, bf_list);
 1259         MALO_TXDESC_SYNC(txq, ds, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
 1260 
 1261         ifp->if_opackets++;
 1262         sc->malo_timer = 5;
 1263         MALO_TXQ_UNLOCK(txq);
 1264         return 0;
 1265 #undef IEEE80211_DIR_DSTODS
 1266 }
 1267 
 1268 static void
 1269 malo_start(struct ifnet *ifp)
 1270 {
 1271         struct malo_softc *sc = ifp->if_softc;
 1272         struct ieee80211_node *ni;
 1273         struct malo_txq *txq = &sc->malo_txq[0];
 1274         struct malo_txbuf *bf = NULL;
 1275         struct mbuf *m;
 1276         int nqueued = 0;
 1277 
 1278         if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || sc->malo_invalid)
 1279                 return;
 1280 
 1281         for (;;) {
 1282                 IFQ_DRV_DEQUEUE(&ifp->if_snd, m);
 1283                 if (m == NULL)
 1284                         break;
 1285                 ni = (struct ieee80211_node *) m->m_pkthdr.rcvif;
 1286                 bf = malo_getbuf(sc, txq);
 1287                 if (bf == NULL) {
 1288                         IFQ_DRV_PREPEND(&ifp->if_snd, m);
 1289 
 1290                         /* XXX blocks other traffic */
 1291                         ifp->if_drv_flags |= IFF_DRV_OACTIVE;
 1292                         sc->malo_stats.mst_tx_qstop++;
 1293                         break;
 1294                 }
 1295                 /*
 1296                  * Pass the frame to the h/w for transmission.
 1297                  */
 1298                 if (malo_tx_start(sc, ni, bf, m)) {
 1299                         ifp->if_oerrors++;
 1300                         if (bf != NULL) {
 1301                                 bf->bf_m = NULL;
 1302                                 bf->bf_node = NULL;
 1303                                 MALO_TXQ_LOCK(txq);
 1304                                 STAILQ_INSERT_HEAD(&txq->free, bf, bf_list);
 1305                                 MALO_TXQ_UNLOCK(txq);
 1306                         }
 1307                         ieee80211_free_node(ni);
 1308                         continue;
 1309                 }
 1310                 nqueued++;
 1311 
 1312                 if (nqueued >= malo_txcoalesce) {
 1313                         /*
 1314                          * Poke the firmware to process queued frames;
 1315                          * see below about (lack of) locking.
 1316                          */
 1317                         nqueued = 0;
 1318                         malo_hal_txstart(sc->malo_mh, 0/*XXX*/);
 1319                 }
 1320         }
 1321 
 1322         if (nqueued) {
 1323                 /*
 1324                  * NB: We don't need to lock against tx done because
 1325                  * this just prods the firmware to check the transmit
 1326                  * descriptors.  The firmware will also start fetching
 1327                  * descriptors by itself if it notices new ones are
 1328                  * present when it goes to deliver a tx done interrupt
 1329                  * to the host. So if we race with tx done processing
 1330                  * it's ok.  Delivering the kick here rather than in
 1331                  * malo_tx_start is an optimization to avoid poking the
 1332                  * firmware for each packet.
 1333                  *
 1334                  * NB: the queue id isn't used so 0 is ok.
 1335                  */
 1336                 malo_hal_txstart(sc->malo_mh, 0/*XXX*/);
 1337         }
 1338 }
 1339 
 1340 static void
 1341 malo_watchdog(void *arg)
 1342 {
 1343         struct malo_softc *sc;
 1344         struct ifnet *ifp;
 1345 
 1346         sc = arg;
 1347         callout_reset(&sc->malo_watchdog_timer, hz, malo_watchdog, sc);
 1348         if (sc->malo_timer == 0 || --sc->malo_timer > 0)
 1349                 return;
 1350 
 1351         ifp = sc->malo_ifp;
 1352         if ((ifp->if_drv_flags & IFF_DRV_RUNNING) && !sc->malo_invalid) {
 1353                 if_printf(ifp, "watchdog timeout\n");
 1354 
 1355                 /* XXX no way to reset h/w. now  */
 1356 
 1357                 ifp->if_oerrors++;
 1358                 sc->malo_stats.mst_watchdog++;
 1359         }
 1360 }
 1361 
 1362 static int
 1363 malo_hal_reset(struct malo_softc *sc)
 1364 {
 1365         static int first = 0;
 1366         struct ifnet *ifp = sc->malo_ifp;
 1367         struct ieee80211com *ic = ifp->if_l2com;
 1368         struct malo_hal *mh = sc->malo_mh;
 1369 
 1370         if (first == 0) {
 1371                 /*
 1372                  * NB: when the device firstly is initialized, sometimes
 1373                  * firmware could override rx/tx dma registers so we re-set
 1374                  * these values once.
 1375                  */
 1376                 malo_hal_set_rxtxdma(sc);
 1377                 first = 1;
 1378         }
 1379 
 1380         malo_hal_setantenna(mh, MHA_ANTENNATYPE_RX, sc->malo_rxantenna);
 1381         malo_hal_setantenna(mh, MHA_ANTENNATYPE_TX, sc->malo_txantenna);
 1382         malo_hal_setradio(mh, 1, MHP_AUTO_PREAMBLE);
 1383         malo_chan_set(sc, ic->ic_curchan);
 1384 
 1385         /* XXX needs other stuffs?  */
 1386 
 1387         return 1;
 1388 }
 1389 
 1390 static __inline struct mbuf *
 1391 malo_getrxmbuf(struct malo_softc *sc, struct malo_rxbuf *bf)
 1392 {
 1393         struct mbuf *m;
 1394         bus_addr_t paddr;
 1395         int error;
 1396 
 1397         /* XXX don't need mbuf, just dma buffer */
 1398         m = m_getjcl(M_NOWAIT, MT_DATA, M_PKTHDR, MJUMPAGESIZE);
 1399         if (m == NULL) {
 1400                 sc->malo_stats.mst_rx_nombuf++; /* XXX */
 1401                 return NULL;
 1402         }
 1403         error = bus_dmamap_load(sc->malo_dmat, bf->bf_dmamap,
 1404             mtod(m, caddr_t), MJUMPAGESIZE,
 1405             malo_load_cb, &paddr, BUS_DMA_NOWAIT);
 1406         if (error != 0) {
 1407                 if_printf(sc->malo_ifp,
 1408                     "%s: bus_dmamap_load failed, error %d\n", __func__, error);
 1409                 m_freem(m);
 1410                 return NULL;
 1411         }
 1412         bf->bf_data = paddr;
 1413         bus_dmamap_sync(sc->malo_dmat, bf->bf_dmamap, BUS_DMASYNC_PREWRITE);
 1414 
 1415         return m;
 1416 }
 1417 
 1418 static int
 1419 malo_rxbuf_init(struct malo_softc *sc, struct malo_rxbuf *bf)
 1420 {
 1421         struct malo_rxdesc *ds;
 1422 
 1423         ds = bf->bf_desc;
 1424         if (bf->bf_m == NULL) {
 1425                 bf->bf_m = malo_getrxmbuf(sc, bf);
 1426                 if (bf->bf_m == NULL) {
 1427                         /* mark descriptor to be skipped */
 1428                         ds->rxcontrol = MALO_RXD_CTRL_OS_OWN;
 1429                         /* NB: don't need PREREAD */
 1430                         MALO_RXDESC_SYNC(sc, ds, BUS_DMASYNC_PREWRITE);
 1431                         return ENOMEM;
 1432                 }
 1433         }
 1434 
 1435         /*
 1436          * Setup descriptor.
 1437          */
 1438         ds->qosctrl = 0;
 1439         ds->snr = 0;
 1440         ds->status = MALO_RXD_STATUS_IDLE;
 1441         ds->channel = 0;
 1442         ds->pktlen = htole16(MALO_RXSIZE);
 1443         ds->nf = 0;
 1444         ds->physbuffdata = htole32(bf->bf_data);
 1445         /* NB: don't touch pPhysNext, set once */
 1446         ds->rxcontrol = MALO_RXD_CTRL_DRIVER_OWN;
 1447         MALO_RXDESC_SYNC(sc, ds, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
 1448 
 1449         return 0;
 1450 }
 1451 
 1452 /*
 1453  * Setup the rx data structures.  This should only be done once or we may get
 1454  * out of sync with the firmware.
 1455  */
 1456 static int
 1457 malo_startrecv(struct malo_softc *sc)
 1458 {
 1459         struct malo_rxbuf *bf, *prev;
 1460         struct malo_rxdesc *ds;
 1461         
 1462         if (sc->malo_recvsetup == 1) {
 1463                 malo_mode_init(sc);             /* set filters, etc. */
 1464                 return 0;
 1465         }
 1466         
 1467         prev = NULL;
 1468         STAILQ_FOREACH(bf, &sc->malo_rxbuf, bf_list) {
 1469                 int error = malo_rxbuf_init(sc, bf);
 1470                 if (error != 0) {
 1471                         DPRINTF(sc, MALO_DEBUG_RECV,
 1472                             "%s: malo_rxbuf_init failed %d\n",
 1473                             __func__, error);
 1474                         return error;
 1475                 }
 1476                 if (prev != NULL) {
 1477                         ds = prev->bf_desc;
 1478                         ds->physnext = htole32(bf->bf_daddr);
 1479                 }
 1480                 prev = bf;
 1481         }
 1482         if (prev != NULL) {
 1483                 ds = prev->bf_desc;
 1484                 ds->physnext =
 1485                     htole32(STAILQ_FIRST(&sc->malo_rxbuf)->bf_daddr);
 1486         }
 1487 
 1488         sc->malo_recvsetup = 1;
 1489 
 1490         malo_mode_init(sc);             /* set filters, etc. */
 1491         
 1492         return 0;
 1493 }
 1494 
 1495 static void
 1496 malo_init_locked(struct malo_softc *sc)
 1497 {
 1498         struct ifnet *ifp = sc->malo_ifp;
 1499         struct malo_hal *mh = sc->malo_mh;
 1500         int error;
 1501         
 1502         DPRINTF(sc, MALO_DEBUG_ANY, "%s: if_flags 0x%x\n",
 1503             __func__, ifp->if_flags);
 1504 
 1505         MALO_LOCK_ASSERT(sc);
 1506         
 1507         /*
 1508          * Stop anything previously setup.  This is safe whether this is
 1509          * the first time through or not.
 1510          */
 1511         malo_stop_locked(ifp, 0);
 1512 
 1513         /*
 1514          * Push state to the firmware.
 1515          */
 1516         if (!malo_hal_reset(sc)) {
 1517                 if_printf(ifp, "%s: unable to reset hardware\n", __func__);
 1518                 return;
 1519         }
 1520 
 1521         /*
 1522          * Setup recv (once); transmit is already good to go.
 1523          */
 1524         error = malo_startrecv(sc);
 1525         if (error != 0) {
 1526                 if_printf(ifp, "%s: unable to start recv logic, error %d\n",
 1527                     __func__, error);
 1528                 return;
 1529         }
 1530 
 1531         /*
 1532          * Enable interrupts.
 1533          */
 1534         sc->malo_imask = MALO_A2HRIC_BIT_RX_RDY
 1535             | MALO_A2HRIC_BIT_TX_DONE
 1536             | MALO_A2HRIC_BIT_OPC_DONE
 1537             | MALO_A2HRIC_BIT_MAC_EVENT
 1538             | MALO_A2HRIC_BIT_RX_PROBLEM
 1539             | MALO_A2HRIC_BIT_ICV_ERROR
 1540             | MALO_A2HRIC_BIT_RADAR_DETECT
 1541             | MALO_A2HRIC_BIT_CHAN_SWITCH;
 1542 
 1543         ifp->if_drv_flags |= IFF_DRV_RUNNING;
 1544         malo_hal_intrset(mh, sc->malo_imask);
 1545         callout_reset(&sc->malo_watchdog_timer, hz, malo_watchdog, sc);
 1546 }
 1547 
 1548 static void
 1549 malo_init(void *arg)
 1550 {
 1551         struct malo_softc *sc = (struct malo_softc *) arg;
 1552         struct ifnet *ifp = sc->malo_ifp;
 1553         struct ieee80211com *ic = ifp->if_l2com;
 1554         
 1555         DPRINTF(sc, MALO_DEBUG_ANY, "%s: if_flags 0x%x\n",
 1556             __func__, ifp->if_flags);
 1557 
 1558         MALO_LOCK(sc);
 1559         malo_init_locked(sc);
 1560 
 1561         MALO_UNLOCK(sc);
 1562 
 1563         if (ifp->if_drv_flags & IFF_DRV_RUNNING)
 1564                 ieee80211_start_all(ic);        /* start all vap's */
 1565 }
 1566 
 1567 /*
 1568  * Set the multicast filter contents into the hardware.
 1569  */
 1570 static void
 1571 malo_setmcastfilter(struct malo_softc *sc)
 1572 {
 1573         struct ifnet *ifp = sc->malo_ifp;
 1574         struct ieee80211com *ic = ifp->if_l2com;
 1575         struct ifmultiaddr *ifma;
 1576         uint8_t macs[IEEE80211_ADDR_LEN * MALO_HAL_MCAST_MAX];
 1577         uint8_t *mp;
 1578         int nmc;
 1579 
 1580         mp = macs;
 1581         nmc = 0;
 1582 
 1583         if (ic->ic_opmode == IEEE80211_M_MONITOR ||
 1584             (ifp->if_flags & (IFF_ALLMULTI | IFF_PROMISC)))
 1585                 goto all;
 1586         
 1587         if_maddr_rlock(ifp);
 1588         TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
 1589                 if (ifma->ifma_addr->sa_family != AF_LINK)
 1590                         continue;
 1591 
 1592                 if (nmc == MALO_HAL_MCAST_MAX) {
 1593                         ifp->if_flags |= IFF_ALLMULTI;
 1594                         if_maddr_runlock(ifp);
 1595                         goto all;
 1596                 }
 1597                 IEEE80211_ADDR_COPY(mp,
 1598                     LLADDR((struct sockaddr_dl *)ifma->ifma_addr));
 1599 
 1600                 mp += IEEE80211_ADDR_LEN, nmc++;
 1601         }
 1602         if_maddr_runlock(ifp);
 1603 
 1604         malo_hal_setmcast(sc->malo_mh, nmc, macs);
 1605 
 1606 all:
 1607         /*
 1608          * XXX we don't know how to set the f/w for supporting
 1609          * IFF_ALLMULTI | IFF_PROMISC cases
 1610          */
 1611         return;
 1612 }
 1613 
 1614 static int
 1615 malo_mode_init(struct malo_softc *sc)
 1616 {
 1617         struct ifnet *ifp = sc->malo_ifp;
 1618         struct ieee80211com *ic = ifp->if_l2com;
 1619         struct malo_hal *mh = sc->malo_mh;
 1620 
 1621         /*
 1622          * NB: Ignore promisc in hostap mode; it's set by the
 1623          * bridge.  This is wrong but we have no way to
 1624          * identify internal requests (from the bridge)
 1625          * versus external requests such as for tcpdump.
 1626          */
 1627         malo_hal_setpromisc(mh, (ifp->if_flags & IFF_PROMISC) &&
 1628             ic->ic_opmode != IEEE80211_M_HOSTAP);
 1629         malo_setmcastfilter(sc);
 1630 
 1631         return ENXIO;
 1632 }
 1633 
 1634 static void
 1635 malo_tx_draintxq(struct malo_softc *sc, struct malo_txq *txq)
 1636 {
 1637         struct ieee80211_node *ni;
 1638         struct malo_txbuf *bf;
 1639         u_int ix;
 1640         
 1641         /*
 1642          * NB: this assumes output has been stopped and
 1643          *     we do not need to block malo_tx_tasklet
 1644          */
 1645         for (ix = 0;; ix++) {
 1646                 MALO_TXQ_LOCK(txq);
 1647                 bf = STAILQ_FIRST(&txq->active);
 1648                 if (bf == NULL) {
 1649                         MALO_TXQ_UNLOCK(txq);
 1650                         break;
 1651                 }
 1652                 STAILQ_REMOVE_HEAD(&txq->active, bf_list);
 1653                 MALO_TXQ_UNLOCK(txq);
 1654 #ifdef MALO_DEBUG
 1655                 if (sc->malo_debug & MALO_DEBUG_RESET) {
 1656                         struct ifnet *ifp = sc->malo_ifp;
 1657                         struct ieee80211com *ic = ifp->if_l2com;
 1658                         const struct malo_txrec *tr =
 1659                             mtod(bf->bf_m, const struct malo_txrec *);
 1660                         malo_printtxbuf(bf, txq->qnum, ix);
 1661                         ieee80211_dump_pkt(ic, (const uint8_t *)&tr->wh,
 1662                             bf->bf_m->m_len - sizeof(tr->fwlen), 0, -1);
 1663                 }
 1664 #endif /* MALO_DEBUG */
 1665                 bus_dmamap_unload(sc->malo_dmat, bf->bf_dmamap);
 1666                 ni = bf->bf_node;
 1667                 bf->bf_node = NULL;
 1668                 if (ni != NULL) {
 1669                         /*
 1670                          * Reclaim node reference.
 1671                          */
 1672                         ieee80211_free_node(ni);
 1673                 }
 1674                 m_freem(bf->bf_m);
 1675                 bf->bf_m = NULL;
 1676                 
 1677                 MALO_TXQ_LOCK(txq);
 1678                 STAILQ_INSERT_TAIL(&txq->free, bf, bf_list);
 1679                 txq->nfree++;
 1680                 MALO_TXQ_UNLOCK(txq);
 1681         }
 1682 }
 1683 
 1684 static void
 1685 malo_stop_locked(struct ifnet *ifp, int disable)
 1686 {
 1687         struct malo_softc *sc = ifp->if_softc;
 1688         struct malo_hal *mh = sc->malo_mh;
 1689         int i;
 1690 
 1691         DPRINTF(sc, MALO_DEBUG_ANY, "%s: invalid %u if_flags 0x%x\n",
 1692             __func__, sc->malo_invalid, ifp->if_flags);
 1693 
 1694         MALO_LOCK_ASSERT(sc);
 1695 
 1696         if (!(ifp->if_drv_flags & IFF_DRV_RUNNING))
 1697                 return;
 1698 
 1699         /*
 1700          * Shutdown the hardware and driver:
 1701          *    disable interrupts
 1702          *    turn off the radio
 1703          *    drain and release tx queues
 1704          *
 1705          * Note that some of this work is not possible if the hardware
 1706          * is gone (invalid).
 1707          */
 1708         ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
 1709         callout_stop(&sc->malo_watchdog_timer);
 1710         sc->malo_timer = 0;
 1711         /* diable interrupt.  */
 1712         malo_hal_intrset(mh, 0);
 1713         /* turn off the radio.  */
 1714         malo_hal_setradio(mh, 0, MHP_AUTO_PREAMBLE);
 1715 
 1716         /* drain and release tx queues.  */
 1717         for (i = 0; i < MALO_NUM_TX_QUEUES; i++)
 1718                 malo_tx_draintxq(sc, &sc->malo_txq[i]);
 1719 }
 1720 
 1721 static int
 1722 malo_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
 1723 {
 1724 #define MALO_IS_RUNNING(ifp) \
 1725         ((ifp->if_flags & IFF_UP) && (ifp->if_drv_flags & IFF_DRV_RUNNING))
 1726         struct malo_softc *sc = ifp->if_softc;
 1727         struct ieee80211com *ic = ifp->if_l2com;
 1728         struct ifreq *ifr = (struct ifreq *) data;
 1729         int error = 0, startall = 0;
 1730 
 1731         MALO_LOCK(sc);
 1732         switch (cmd) {
 1733         case SIOCSIFFLAGS:
 1734                 if (MALO_IS_RUNNING(ifp)) {
 1735                         /*
 1736                          * To avoid rescanning another access point,
 1737                          * do not call malo_init() here.  Instead,
 1738                          * only reflect promisc mode settings.
 1739                          */
 1740                         malo_mode_init(sc);
 1741                 } else if (ifp->if_flags & IFF_UP) {
 1742                         /*
 1743                          * Beware of being called during attach/detach
 1744                          * to reset promiscuous mode.  In that case we
 1745                          * will still be marked UP but not RUNNING.
 1746                          * However trying to re-init the interface
 1747                          * is the wrong thing to do as we've already
 1748                          * torn down much of our state.  There's
 1749                          * probably a better way to deal with this.
 1750                          */
 1751                         if (!sc->malo_invalid) {
 1752                                 malo_init_locked(sc);
 1753                                 startall = 1;
 1754                         }
 1755                 } else
 1756                         malo_stop_locked(ifp, 1);
 1757                 break;
 1758         case SIOCGIFMEDIA:
 1759         case SIOCSIFMEDIA:
 1760                 error = ifmedia_ioctl(ifp, ifr, &ic->ic_media, cmd);
 1761                 break;
 1762         default:
 1763                 error = ether_ioctl(ifp, cmd, data);
 1764                 break;
 1765         }
 1766         MALO_UNLOCK(sc);
 1767 
 1768         if (startall)
 1769                 ieee80211_start_all(ic);
 1770         return error;
 1771 #undef MALO_IS_RUNNING
 1772 }
 1773 
 1774 /*
 1775  * Callback from the 802.11 layer to update the slot time
 1776  * based on the current setting.  We use it to notify the
 1777  * firmware of ERP changes and the f/w takes care of things
 1778  * like slot time and preamble.
 1779  */
 1780 static void
 1781 malo_updateslot(struct ifnet *ifp)
 1782 {
 1783         struct malo_softc *sc = ifp->if_softc;
 1784         struct ieee80211com *ic = ifp->if_l2com;
 1785         struct malo_hal *mh = sc->malo_mh;
 1786         int error;
 1787         
 1788         /* NB: can be called early; suppress needless cmds */
 1789         if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
 1790                 return;
 1791 
 1792         DPRINTF(sc, MALO_DEBUG_RESET,
 1793             "%s: chan %u MHz/flags 0x%x %s slot, (ic_flags 0x%x)\n",
 1794             __func__, ic->ic_curchan->ic_freq, ic->ic_curchan->ic_flags,
 1795             ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", ic->ic_flags);
 1796 
 1797         if (ic->ic_flags & IEEE80211_F_SHSLOT)
 1798                 error = malo_hal_set_slot(mh, 1);
 1799         else
 1800                 error = malo_hal_set_slot(mh, 0);
 1801 
 1802         if (error != 0)
 1803                 device_printf(sc->malo_dev, "setting %s slot failed\n",
 1804                         ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long");
 1805 }
 1806 
 1807 static int
 1808 malo_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
 1809 {
 1810         struct ieee80211com *ic = vap->iv_ic;
 1811         struct malo_softc *sc = ic->ic_ifp->if_softc;
 1812         struct malo_hal *mh = sc->malo_mh;
 1813         int error;
 1814 
 1815         DPRINTF(sc, MALO_DEBUG_STATE, "%s: %s -> %s\n", __func__,
 1816             ieee80211_state_name[vap->iv_state],
 1817             ieee80211_state_name[nstate]);
 1818 
 1819         /*
 1820          * Invoke the net80211 layer first so iv_bss is setup.
 1821          */
 1822         error = MALO_VAP(vap)->malo_newstate(vap, nstate, arg);
 1823         if (error != 0)
 1824                 return error;
 1825 
 1826         if (nstate == IEEE80211_S_RUN && vap->iv_state != IEEE80211_S_RUN) {
 1827                 struct ieee80211_node *ni = vap->iv_bss;
 1828                 enum ieee80211_phymode mode = ieee80211_chan2mode(ni->ni_chan);
 1829                 const struct ieee80211_txparam *tp = &vap->iv_txparms[mode];
 1830 
 1831                 DPRINTF(sc, MALO_DEBUG_STATE,
 1832                     "%s: %s(RUN): iv_flags 0x%08x bintvl %d bssid %s "
 1833                     "capinfo 0x%04x chan %d associd 0x%x mode %d rate %d\n",
 1834                     vap->iv_ifp->if_xname, __func__, vap->iv_flags,
 1835                     ni->ni_intval, ether_sprintf(ni->ni_bssid), ni->ni_capinfo,
 1836                     ieee80211_chan2ieee(ic, ic->ic_curchan),
 1837                     ni->ni_associd, mode, tp->ucastrate);
 1838 
 1839                 malo_hal_setradio(mh, 1,
 1840                     (ic->ic_flags & IEEE80211_F_SHPREAMBLE) ?
 1841                         MHP_SHORT_PREAMBLE : MHP_LONG_PREAMBLE);
 1842                 malo_hal_setassocid(sc->malo_mh, ni->ni_bssid, ni->ni_associd);
 1843                 malo_hal_set_rate(mh, mode, 
 1844                    tp->ucastrate == IEEE80211_FIXED_RATE_NONE ?
 1845                        0 : malo_fix2rate(tp->ucastrate));
 1846         }
 1847         return 0;
 1848 }
 1849 
 1850 static int
 1851 malo_raw_xmit(struct ieee80211_node *ni, struct mbuf *m,
 1852         const struct ieee80211_bpf_params *params)
 1853 {
 1854         struct ieee80211com *ic = ni->ni_ic;
 1855         struct ifnet *ifp = ic->ic_ifp;
 1856         struct malo_softc *sc = ifp->if_softc;
 1857         struct malo_txbuf *bf;
 1858         struct malo_txq *txq;
 1859 
 1860         if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || sc->malo_invalid) {
 1861                 ieee80211_free_node(ni);
 1862                 m_freem(m);
 1863                 return ENETDOWN;
 1864         }
 1865 
 1866         /*
 1867          * Grab a TX buffer and associated resources.  Note that we depend
 1868          * on the classification by the 802.11 layer to get to the right h/w
 1869          * queue.  Management frames must ALWAYS go on queue 1 but we
 1870          * cannot just force that here because we may receive non-mgt frames.
 1871          */
 1872         txq = &sc->malo_txq[0];
 1873         bf = malo_getbuf(sc, txq);
 1874         if (bf == NULL) {
 1875                 /* XXX blocks other traffic */
 1876                 ifp->if_drv_flags |= IFF_DRV_OACTIVE;
 1877                 ieee80211_free_node(ni);
 1878                 m_freem(m);
 1879                 return ENOBUFS;
 1880         }
 1881 
 1882         /*
 1883          * Pass the frame to the h/w for transmission.
 1884          */
 1885         if (malo_tx_start(sc, ni, bf, m) != 0) {
 1886                 ifp->if_oerrors++;
 1887                 bf->bf_m = NULL;
 1888                 bf->bf_node = NULL;
 1889                 MALO_TXQ_LOCK(txq);
 1890                 STAILQ_INSERT_HEAD(&txq->free, bf, bf_list);
 1891                 txq->nfree++;
 1892                 MALO_TXQ_UNLOCK(txq);
 1893 
 1894                 ieee80211_free_node(ni);
 1895                 return EIO;             /* XXX */
 1896         }
 1897 
 1898         /*
 1899          * NB: We don't need to lock against tx done because this just
 1900          * prods the firmware to check the transmit descriptors.  The firmware
 1901          * will also start fetching descriptors by itself if it notices
 1902          * new ones are present when it goes to deliver a tx done interrupt
 1903          * to the host. So if we race with tx done processing it's ok.
 1904          * Delivering the kick here rather than in malo_tx_start is
 1905          * an optimization to avoid poking the firmware for each packet.
 1906          *
 1907          * NB: the queue id isn't used so 0 is ok.
 1908          */
 1909         malo_hal_txstart(sc->malo_mh, 0/*XXX*/);
 1910 
 1911         return 0;
 1912 }
 1913 
 1914 static void
 1915 malo_sysctlattach(struct malo_softc *sc)
 1916 {
 1917 #ifdef  MALO_DEBUG
 1918         struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(sc->malo_dev);
 1919         struct sysctl_oid *tree = device_get_sysctl_tree(sc->malo_dev);
 1920 
 1921         sc->malo_debug = malo_debug;
 1922         SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
 1923                 "debug", CTLFLAG_RW, &sc->malo_debug, 0,
 1924                 "control debugging printfs");
 1925 #endif
 1926 }
 1927 
 1928 static void
 1929 malo_announce(struct malo_softc *sc)
 1930 {
 1931         struct ifnet *ifp = sc->malo_ifp;
 1932 
 1933         if_printf(ifp, "versions [hw %d fw %d.%d.%d.%d] (regioncode %d)\n",
 1934                 sc->malo_hwspecs.hwversion,
 1935                 (sc->malo_hwspecs.fw_releasenum >> 24) & 0xff,
 1936                 (sc->malo_hwspecs.fw_releasenum >> 16) & 0xff,
 1937                 (sc->malo_hwspecs.fw_releasenum >> 8) & 0xff,
 1938                 (sc->malo_hwspecs.fw_releasenum >> 0) & 0xff,
 1939                 sc->malo_hwspecs.regioncode);
 1940 
 1941         if (bootverbose || malo_rxbuf != MALO_RXBUF)
 1942                 if_printf(ifp, "using %u rx buffers\n", malo_rxbuf);
 1943         if (bootverbose || malo_txbuf != MALO_TXBUF)
 1944                 if_printf(ifp, "using %u tx buffers\n", malo_txbuf);
 1945 }
 1946 
 1947 /*
 1948  * Convert net80211 channel to a HAL channel.
 1949  */
 1950 static void
 1951 malo_mapchan(struct malo_hal_channel *hc, const struct ieee80211_channel *chan)
 1952 {
 1953         hc->channel = chan->ic_ieee;
 1954 
 1955         *(uint32_t *)&hc->flags = 0;
 1956         if (IEEE80211_IS_CHAN_2GHZ(chan))
 1957                 hc->flags.freqband = MALO_FREQ_BAND_2DOT4GHZ;
 1958 }
 1959 
 1960 /*
 1961  * Set/change channels.  If the channel is really being changed,
 1962  * it's done by reseting the chip.  To accomplish this we must
 1963  * first cleanup any pending DMA, then restart stuff after a la
 1964  * malo_init.
 1965  */
 1966 static int
 1967 malo_chan_set(struct malo_softc *sc, struct ieee80211_channel *chan)
 1968 {
 1969         struct malo_hal *mh = sc->malo_mh;
 1970         struct malo_hal_channel hchan;
 1971 
 1972         DPRINTF(sc, MALO_DEBUG_RESET, "%s: chan %u MHz/flags 0x%x\n",
 1973             __func__, chan->ic_freq, chan->ic_flags);
 1974 
 1975         /*
 1976          * Convert to a HAL channel description with the flags constrained
 1977          * to reflect the current operating mode.
 1978          */
 1979         malo_mapchan(&hchan, chan);
 1980         malo_hal_intrset(mh, 0);                /* disable interrupts */
 1981         malo_hal_setchannel(mh, &hchan);
 1982         malo_hal_settxpower(mh, &hchan);
 1983 
 1984         /*
 1985          * Update internal state.
 1986          */
 1987         sc->malo_tx_th.wt_chan_freq = htole16(chan->ic_freq);
 1988         sc->malo_rx_th.wr_chan_freq = htole16(chan->ic_freq);
 1989         if (IEEE80211_IS_CHAN_ANYG(chan)) {
 1990                 sc->malo_tx_th.wt_chan_flags = htole16(IEEE80211_CHAN_G);
 1991                 sc->malo_rx_th.wr_chan_flags = htole16(IEEE80211_CHAN_G);
 1992         } else {
 1993                 sc->malo_tx_th.wt_chan_flags = htole16(IEEE80211_CHAN_B);
 1994                 sc->malo_rx_th.wr_chan_flags = htole16(IEEE80211_CHAN_B);
 1995         }
 1996         sc->malo_curchan = hchan;
 1997         malo_hal_intrset(mh, sc->malo_imask);
 1998 
 1999         return 0;
 2000 }
 2001 
 2002 static void
 2003 malo_scan_start(struct ieee80211com *ic)
 2004 {
 2005         struct ifnet *ifp = ic->ic_ifp;
 2006         struct malo_softc *sc = ifp->if_softc;
 2007 
 2008         DPRINTF(sc, MALO_DEBUG_STATE, "%s\n", __func__);
 2009 }
 2010 
 2011 static void
 2012 malo_scan_end(struct ieee80211com *ic)
 2013 {
 2014         struct ifnet *ifp = ic->ic_ifp;
 2015         struct malo_softc *sc = ifp->if_softc;
 2016 
 2017         DPRINTF(sc, MALO_DEBUG_STATE, "%s\n", __func__);
 2018 }
 2019 
 2020 static void
 2021 malo_set_channel(struct ieee80211com *ic)
 2022 {
 2023         struct ifnet *ifp = ic->ic_ifp;
 2024         struct malo_softc *sc = ifp->if_softc;
 2025 
 2026         (void) malo_chan_set(sc, ic->ic_curchan);
 2027 }
 2028 
 2029 static void
 2030 malo_rx_proc(void *arg, int npending)
 2031 {
 2032 #define IEEE80211_DIR_DSTODS(wh)                                        \
 2033         ((((const struct ieee80211_frame *)wh)->i_fc[1] &               \
 2034             IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS)
 2035         struct malo_softc *sc = arg;
 2036         struct ifnet *ifp = sc->malo_ifp;
 2037         struct ieee80211com *ic = ifp->if_l2com;
 2038         struct malo_rxbuf *bf;
 2039         struct malo_rxdesc *ds;
 2040         struct mbuf *m, *mnew;
 2041         struct ieee80211_qosframe *wh;
 2042         struct ieee80211_qosframe_addr4 *wh4;
 2043         struct ieee80211_node *ni;
 2044         int off, len, hdrlen, pktlen, rssi, ntodo;
 2045         uint8_t *data, status;
 2046         uint32_t readptr, writeptr;
 2047 
 2048         DPRINTF(sc, MALO_DEBUG_RX_PROC,
 2049             "%s: pending %u rdptr(0x%x) 0x%x wrptr(0x%x) 0x%x\n",
 2050             __func__, npending,
 2051             sc->malo_hwspecs.rxdesc_read,
 2052             malo_bar0_read4(sc, sc->malo_hwspecs.rxdesc_read),
 2053             sc->malo_hwspecs.rxdesc_write,
 2054             malo_bar0_read4(sc, sc->malo_hwspecs.rxdesc_write));
 2055 
 2056         readptr = malo_bar0_read4(sc, sc->malo_hwspecs.rxdesc_read);
 2057         writeptr = malo_bar0_read4(sc, sc->malo_hwspecs.rxdesc_write);
 2058         if (readptr == writeptr)
 2059                 return;
 2060 
 2061         bf = sc->malo_rxnext;
 2062         for (ntodo = malo_rxquota; ntodo > 0 && readptr != writeptr; ntodo--) {
 2063                 if (bf == NULL) {
 2064                         bf = STAILQ_FIRST(&sc->malo_rxbuf);
 2065                         break;
 2066                 }
 2067                 ds = bf->bf_desc;
 2068                 if (bf->bf_m == NULL) {
 2069                         /*
 2070                          * If data allocation failed previously there
 2071                          * will be no buffer; try again to re-populate it.
 2072                          * Note the firmware will not advance to the next
 2073                          * descriptor with a dma buffer so we must mimic
 2074                          * this or we'll get out of sync.
 2075                          */ 
 2076                         DPRINTF(sc, MALO_DEBUG_ANY,
 2077                             "%s: rx buf w/o dma memory\n", __func__);
 2078                         (void)malo_rxbuf_init(sc, bf);
 2079                         break;
 2080                 }
 2081                 MALO_RXDESC_SYNC(sc, ds,
 2082                     BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
 2083                 if (ds->rxcontrol != MALO_RXD_CTRL_DMA_OWN)
 2084                         break;
 2085 
 2086                 readptr = le32toh(ds->physnext);
 2087 
 2088 #ifdef MALO_DEBUG
 2089                 if (sc->malo_debug & MALO_DEBUG_RECV_DESC)
 2090                         malo_printrxbuf(bf, 0);
 2091 #endif
 2092                 status = ds->status;
 2093                 if (status & MALO_RXD_STATUS_DECRYPT_ERR_MASK) {
 2094                         ifp->if_ierrors++;
 2095                         goto rx_next;
 2096                 }
 2097                 /*
 2098                  * Sync the data buffer.
 2099                  */
 2100                 len = le16toh(ds->pktlen);
 2101                 bus_dmamap_sync(sc->malo_dmat, bf->bf_dmamap,
 2102                     BUS_DMASYNC_POSTREAD);
 2103                 /*
 2104                  * The 802.11 header is provided all or in part at the front;
 2105                  * use it to calculate the true size of the header that we'll
 2106                  * construct below.  We use this to figure out where to copy
 2107                  * payload prior to constructing the header.
 2108                  */
 2109                 m = bf->bf_m;
 2110                 data = mtod(m, uint8_t *);
 2111                 hdrlen = ieee80211_anyhdrsize(data + sizeof(uint16_t));
 2112                 off = sizeof(uint16_t) + sizeof(struct ieee80211_frame_addr4);
 2113 
 2114                 /*
 2115                  * Calculate RSSI. XXX wrong
 2116                  */
 2117                 rssi = 2 * ((int) ds->snr - ds->nf);    /* NB: .5 dBm  */
 2118                 if (rssi > 100)
 2119                         rssi = 100;
 2120 
 2121                 pktlen = hdrlen + (len - off);
 2122                 /*
 2123                  * NB: we know our frame is at least as large as
 2124                  * IEEE80211_MIN_LEN because there is a 4-address frame at
 2125                  * the front.  Hence there's no need to vet the packet length.
 2126                  * If the frame in fact is too small it should be discarded
 2127                  * at the net80211 layer.
 2128                  */
 2129 
 2130                 /* XXX don't need mbuf, just dma buffer */
 2131                 mnew = malo_getrxmbuf(sc, bf);
 2132                 if (mnew == NULL) {
 2133                         ifp->if_ierrors++;
 2134                         goto rx_next;
 2135                 }
 2136                 /*
 2137                  * Attach the dma buffer to the mbuf; malo_rxbuf_init will
 2138                  * re-setup the rx descriptor using the replacement dma
 2139                  * buffer we just installed above.
 2140                  */
 2141                 bf->bf_m = mnew;
 2142                 m->m_data += off - hdrlen;
 2143                 m->m_pkthdr.len = m->m_len = pktlen;
 2144                 m->m_pkthdr.rcvif = ifp;
 2145 
 2146                 /*
 2147                  * Piece 802.11 header together.
 2148                  */
 2149                 wh = mtod(m, struct ieee80211_qosframe *);
 2150                 /* NB: don't need to do this sometimes but ... */
 2151                 /* XXX special case so we can memcpy after m_devget? */
 2152                 ovbcopy(data + sizeof(uint16_t), wh, hdrlen);
 2153                 if (IEEE80211_QOS_HAS_SEQ(wh)) {
 2154                         if (IEEE80211_DIR_DSTODS(wh)) {
 2155                                 wh4 = mtod(m,
 2156                                     struct ieee80211_qosframe_addr4*);
 2157                                 *(uint16_t *)wh4->i_qos = ds->qosctrl;
 2158                         } else {
 2159                                 *(uint16_t *)wh->i_qos = ds->qosctrl;
 2160                         }
 2161                 }
 2162                 if (ieee80211_radiotap_active(ic)) {
 2163                         sc->malo_rx_th.wr_flags = 0;
 2164                         sc->malo_rx_th.wr_rate = ds->rate;
 2165                         sc->malo_rx_th.wr_antsignal = rssi;
 2166                         sc->malo_rx_th.wr_antnoise = ds->nf;
 2167                 }
 2168 #ifdef MALO_DEBUG
 2169                 if (IFF_DUMPPKTS_RECV(sc, wh)) {
 2170                         ieee80211_dump_pkt(ic, mtod(m, caddr_t),
 2171                             len, ds->rate, rssi);
 2172                 }
 2173 #endif
 2174                 ifp->if_ipackets++;
 2175                 
 2176                 /* dispatch */
 2177                 ni = ieee80211_find_rxnode(ic,
 2178                     (struct ieee80211_frame_min *)wh);
 2179                 if (ni != NULL) {
 2180                         (void) ieee80211_input(ni, m, rssi, ds->nf);
 2181                         ieee80211_free_node(ni);
 2182                 } else
 2183                         (void) ieee80211_input_all(ic, m, rssi, ds->nf);
 2184 rx_next:
 2185                 /* NB: ignore ENOMEM so we process more descriptors */
 2186                 (void) malo_rxbuf_init(sc, bf);
 2187                 bf = STAILQ_NEXT(bf, bf_list);
 2188         }
 2189         
 2190         malo_bar0_write4(sc, sc->malo_hwspecs.rxdesc_read, readptr);
 2191         sc->malo_rxnext = bf;
 2192 
 2193         if ((ifp->if_drv_flags & IFF_DRV_OACTIVE) == 0 &&
 2194             !IFQ_IS_EMPTY(&ifp->if_snd))
 2195                 malo_start(ifp);
 2196 #undef IEEE80211_DIR_DSTODS
 2197 }
 2198 
 2199 static void
 2200 malo_stop(struct ifnet *ifp, int disable)
 2201 {
 2202         struct malo_softc *sc = ifp->if_softc;
 2203 
 2204         MALO_LOCK(sc);
 2205         malo_stop_locked(ifp, disable);
 2206         MALO_UNLOCK(sc);
 2207 }
 2208 
 2209 /*
 2210  * Reclaim all tx queue resources.
 2211  */
 2212 static void
 2213 malo_tx_cleanup(struct malo_softc *sc)
 2214 {
 2215         int i;
 2216 
 2217         for (i = 0; i < MALO_NUM_TX_QUEUES; i++)
 2218                 malo_tx_cleanupq(sc, &sc->malo_txq[i]);
 2219 }
 2220 
 2221 int
 2222 malo_detach(struct malo_softc *sc)
 2223 {
 2224         struct ifnet *ifp = sc->malo_ifp;
 2225         struct ieee80211com *ic = ifp->if_l2com;
 2226 
 2227         DPRINTF(sc, MALO_DEBUG_ANY, "%s: if_flags %x\n",
 2228                 __func__, ifp->if_flags);
 2229 
 2230         malo_stop(ifp, 1);
 2231 
 2232         if (sc->malo_tq != NULL) {
 2233                 taskqueue_drain(sc->malo_tq, &sc->malo_rxtask);
 2234                 taskqueue_drain(sc->malo_tq, &sc->malo_txtask);
 2235                 taskqueue_free(sc->malo_tq);
 2236                 sc->malo_tq = NULL;
 2237         }
 2238 
 2239         /*
 2240          * NB: the order of these is important:
 2241          * o call the 802.11 layer before detaching the hal to
 2242          *   insure callbacks into the driver to delete global
 2243          *   key cache entries can be handled
 2244          * o reclaim the tx queue data structures after calling
 2245          *   the 802.11 layer as we'll get called back to reclaim
 2246          *   node state and potentially want to use them
 2247          * o to cleanup the tx queues the hal is called, so detach
 2248          *   it last
 2249          * Other than that, it's straightforward...
 2250          */
 2251         ieee80211_ifdetach(ic);
 2252         callout_drain(&sc->malo_watchdog_timer);
 2253         malo_dma_cleanup(sc);
 2254         malo_tx_cleanup(sc);
 2255         malo_hal_detach(sc->malo_mh);
 2256         if_free(ifp);
 2257 
 2258         MALO_LOCK_DESTROY(sc);
 2259 
 2260         return 0;
 2261 }
 2262 
 2263 void
 2264 malo_shutdown(struct malo_softc *sc)
 2265 {
 2266         malo_stop(sc->malo_ifp, 1);
 2267 }
 2268 
 2269 void
 2270 malo_suspend(struct malo_softc *sc)
 2271 {
 2272         struct ifnet *ifp = sc->malo_ifp;
 2273 
 2274         DPRINTF(sc, MALO_DEBUG_ANY, "%s: if_flags %x\n",
 2275                 __func__, ifp->if_flags);
 2276 
 2277         malo_stop(ifp, 1);
 2278 }
 2279 
 2280 void
 2281 malo_resume(struct malo_softc *sc)
 2282 {
 2283         struct ifnet *ifp = sc->malo_ifp;
 2284 
 2285         DPRINTF(sc, MALO_DEBUG_ANY, "%s: if_flags %x\n",
 2286                 __func__, ifp->if_flags);
 2287 
 2288         if (ifp->if_flags & IFF_UP)
 2289                 malo_init(sc);
 2290 }

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