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/8.1/sys/dev/malo/if_malo.c 203786 2010-02-11 18:34:06Z mjacob $");
   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 MALLOC_DEFINE(M_MALODEV, "malodev", "malo driver dma buffers");
  127 
  128 static struct ieee80211vap *malo_vap_create(struct ieee80211com *ic,
  129         const char name[IFNAMSIZ], int unit, int opmode, int flags,
  130         const uint8_t bssid[IEEE80211_ADDR_LEN],
  131         const uint8_t mac[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(struct ifnet *);
  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%zx val 0x%x\n",
  172             __func__, 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 
  195         /* set these up early for if_printf use */
  196         if_initname(ifp, device_get_name(sc->malo_dev),
  197             device_get_unit(sc->malo_dev));
  198 
  199         mh = malo_hal_attach(sc->malo_dev, devid,
  200             sc->malo_io1h, sc->malo_io1t, sc->malo_dmat);
  201         if (mh == NULL) {
  202                 if_printf(ifp, "unable to attach HAL\n");
  203                 error = EIO;
  204                 goto bad;
  205         }
  206         sc->malo_mh = mh;
  207 
  208         /*
  209          * Load firmware so we can get setup.  We arbitrarily pick station
  210          * firmware; we'll re-load firmware as needed so setting up
  211          * the wrong mode isn't a big deal.
  212          */
  213         error = malo_hal_fwload(mh, "malo8335-h", "malo8335-m");
  214         if (error != 0) {
  215                 if_printf(ifp, "unable to setup firmware\n");
  216                 goto bad1;
  217         }
  218         /* XXX gethwspecs() extracts correct informations?  not maybe!  */
  219         error = malo_hal_gethwspecs(mh, &sc->malo_hwspecs);
  220         if (error != 0) {
  221                 if_printf(ifp, "unable to fetch h/w specs\n");
  222                 goto bad1;
  223         }
  224 
  225         DPRINTF(sc, MALO_DEBUG_FW,
  226             "malo_hal_gethwspecs: hwversion 0x%x hostif 0x%x"
  227             "maxnum_wcb 0x%x maxnum_mcaddr 0x%x maxnum_tx_wcb 0x%x"
  228             "regioncode 0x%x num_antenna 0x%x fw_releasenum 0x%x"
  229             "wcbbase0 0x%x rxdesc_read 0x%x rxdesc_write 0x%x"
  230             "ul_fw_awakecookie 0x%x w[4] = %x %x %x %x",
  231             sc->malo_hwspecs.hwversion,
  232             sc->malo_hwspecs.hostinterface, sc->malo_hwspecs.maxnum_wcb,
  233             sc->malo_hwspecs.maxnum_mcaddr, sc->malo_hwspecs.maxnum_tx_wcb,
  234             sc->malo_hwspecs.regioncode, sc->malo_hwspecs.num_antenna,
  235             sc->malo_hwspecs.fw_releasenum, sc->malo_hwspecs.wcbbase0,
  236             sc->malo_hwspecs.rxdesc_read, sc->malo_hwspecs.rxdesc_write,
  237             sc->malo_hwspecs.ul_fw_awakecookie,
  238             sc->malo_hwspecs.wcbbase[0], sc->malo_hwspecs.wcbbase[1],
  239             sc->malo_hwspecs.wcbbase[2], sc->malo_hwspecs.wcbbase[3]);
  240 
  241         /* NB: firmware looks that it does not export regdomain info API.  */
  242         bands = 0;
  243         setbit(&bands, IEEE80211_MODE_11B);
  244         setbit(&bands, IEEE80211_MODE_11G);
  245         ieee80211_init_channels(ic, NULL, &bands);
  246 
  247         sc->malo_txantenna = 0x2;       /* h/w default */
  248         sc->malo_rxantenna = 0xffff;    /* h/w default */
  249 
  250         /*
  251          * Allocate tx + rx descriptors and populate the lists.
  252          * We immediately push the information to the firmware
  253          * as otherwise it gets upset.
  254          */
  255         error = malo_dma_setup(sc);
  256         if (error != 0) {
  257                 if_printf(ifp, "failed to setup descriptors: %d\n", error);
  258                 goto bad1;
  259         }
  260         error = malo_setup_hwdma(sc);   /* push to firmware */
  261         if (error != 0)                 /* NB: malo_setupdma prints msg */
  262                 goto bad2;
  263 
  264         sc->malo_tq = taskqueue_create_fast("malo_taskq", M_NOWAIT,
  265                 taskqueue_thread_enqueue, &sc->malo_tq);
  266         taskqueue_start_threads(&sc->malo_tq, 1, PI_NET,
  267                 "%s taskq", ifp->if_xname);
  268 
  269         TASK_INIT(&sc->malo_rxtask, 0, malo_rx_proc, sc);
  270         TASK_INIT(&sc->malo_txtask, 0, malo_tx_proc, sc);
  271 
  272         ifp->if_softc = sc;
  273         ifp->if_flags = IFF_SIMPLEX | IFF_BROADCAST | IFF_MULTICAST;
  274         ifp->if_start = malo_start;
  275         ifp->if_watchdog = malo_watchdog;
  276         ifp->if_ioctl = malo_ioctl;
  277         ifp->if_init = malo_init;
  278         IFQ_SET_MAXLEN(&ifp->if_snd, IFQ_MAXLEN);
  279         ifp->if_snd.ifq_drv_maxlen = IFQ_MAXLEN;
  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,
  348         const char name[IFNAMSIZ], int unit, int 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, "%s: %s DMA map: %p (%lu) -> %p (%lu)\n",
  525             __func__, dd->dd_name, ds, (u_long) dd->dd_desc_len,
  526             (caddr_t) dd->dd_desc_paddr, /*XXX*/ (u_long) dd->dd_desc_len);
  527 
  528         return 0;
  529 fail2:
  530         bus_dmamem_free(dd->dd_dmat, dd->dd_desc, dd->dd_dmamap);
  531 fail1:
  532         bus_dmamap_destroy(dd->dd_dmat, dd->dd_dmamap);
  533 fail0:
  534         bus_dma_tag_destroy(dd->dd_dmat);
  535         memset(dd, 0, sizeof(*dd));
  536         return error;
  537 }
  538 
  539 #define DS2PHYS(_dd, _ds) \
  540         ((_dd)->dd_desc_paddr + ((caddr_t)(_ds) - (caddr_t)(_dd)->dd_desc))
  541 
  542 static int
  543 malo_rxdma_setup(struct malo_softc *sc)
  544 {
  545         struct ifnet *ifp = sc->malo_ifp;
  546         int error, bsize, i;
  547         struct malo_rxbuf *bf;
  548         struct malo_rxdesc *ds;
  549 
  550         error = malo_desc_setup(sc, "rx", &sc->malo_rxdma,
  551             malo_rxbuf, sizeof(struct malo_rxbuf),
  552             1, sizeof(struct malo_rxdesc));
  553         if (error != 0)
  554                 return error;
  555 
  556         /*
  557          * Allocate rx buffers and set them up.
  558          */
  559         bsize = malo_rxbuf * sizeof(struct malo_rxbuf);
  560         bf = malloc(bsize, M_MALODEV, M_NOWAIT | M_ZERO);
  561         if (bf == NULL) {
  562                 if_printf(ifp, "malloc of %u rx buffers failed\n", bsize);
  563                 return error;
  564         }
  565         sc->malo_rxdma.dd_bufptr = bf;
  566         
  567         STAILQ_INIT(&sc->malo_rxbuf);
  568         ds = sc->malo_rxdma.dd_desc;
  569         for (i = 0; i < malo_rxbuf; i++, bf++, ds++) {
  570                 bf->bf_desc = ds;
  571                 bf->bf_daddr = DS2PHYS(&sc->malo_rxdma, ds);
  572                 error = bus_dmamap_create(sc->malo_dmat, BUS_DMA_NOWAIT,
  573                     &bf->bf_dmamap);
  574                 if (error != 0) {
  575                         if_printf(ifp, "%s: unable to dmamap for rx buffer, "
  576                             "error %d\n", __func__, error);
  577                         return error;
  578                 }
  579                 /* NB: tail is intentional to preserve descriptor order */
  580                 STAILQ_INSERT_TAIL(&sc->malo_rxbuf, bf, bf_list);
  581         }
  582         return 0;
  583 }
  584 
  585 static int
  586 malo_txdma_setup(struct malo_softc *sc, struct malo_txq *txq)
  587 {
  588         struct ifnet *ifp = sc->malo_ifp;
  589         int error, bsize, i;
  590         struct malo_txbuf *bf;
  591         struct malo_txdesc *ds;
  592 
  593         error = malo_desc_setup(sc, "tx", &txq->dma,
  594             malo_txbuf, sizeof(struct malo_txbuf),
  595             MALO_TXDESC, sizeof(struct malo_txdesc));
  596         if (error != 0)
  597                 return error;
  598         
  599         /* allocate and setup tx buffers */
  600         bsize = malo_txbuf * sizeof(struct malo_txbuf);
  601         bf = malloc(bsize, M_MALODEV, M_NOWAIT | M_ZERO);
  602         if (bf == NULL) {
  603                 if_printf(ifp, "malloc of %u tx buffers failed\n",
  604                     malo_txbuf);
  605                 return ENOMEM;
  606         }
  607         txq->dma.dd_bufptr = bf;
  608         
  609         STAILQ_INIT(&txq->free);
  610         txq->nfree = 0;
  611         ds = txq->dma.dd_desc;
  612         for (i = 0; i < malo_txbuf; i++, bf++, ds += MALO_TXDESC) {
  613                 bf->bf_desc = ds;
  614                 bf->bf_daddr = DS2PHYS(&txq->dma, ds);
  615                 error = bus_dmamap_create(sc->malo_dmat, BUS_DMA_NOWAIT,
  616                     &bf->bf_dmamap);
  617                 if (error != 0) {
  618                         if_printf(ifp, "unable to create dmamap for tx "
  619                             "buffer %u, error %u\n", i, error);
  620                         return error;
  621                 }
  622                 STAILQ_INSERT_TAIL(&txq->free, bf, bf_list);
  623                 txq->nfree++;
  624         }
  625 
  626         return 0;
  627 }
  628 
  629 static void
  630 malo_desc_cleanup(struct malo_softc *sc, struct malo_descdma *dd)
  631 {
  632         bus_dmamap_unload(dd->dd_dmat, dd->dd_dmamap);
  633         bus_dmamem_free(dd->dd_dmat, dd->dd_desc, dd->dd_dmamap);
  634         bus_dmamap_destroy(dd->dd_dmat, dd->dd_dmamap);
  635         bus_dma_tag_destroy(dd->dd_dmat);
  636 
  637         memset(dd, 0, sizeof(*dd));
  638 }
  639 
  640 static void
  641 malo_rxdma_cleanup(struct malo_softc *sc)
  642 {
  643         struct malo_rxbuf *bf;
  644 
  645         STAILQ_FOREACH(bf, &sc->malo_rxbuf, bf_list) {
  646                 if (bf->bf_m != NULL) {
  647                         m_freem(bf->bf_m);
  648                         bf->bf_m = NULL;
  649                 }
  650                 if (bf->bf_dmamap != NULL) {
  651                         bus_dmamap_destroy(sc->malo_dmat, bf->bf_dmamap);
  652                         bf->bf_dmamap = NULL;
  653                 }
  654         }
  655         STAILQ_INIT(&sc->malo_rxbuf);
  656         if (sc->malo_rxdma.dd_bufptr != NULL) {
  657                 free(sc->malo_rxdma.dd_bufptr, M_MALODEV);
  658                 sc->malo_rxdma.dd_bufptr = NULL;
  659         }
  660         if (sc->malo_rxdma.dd_desc_len != 0)
  661                 malo_desc_cleanup(sc, &sc->malo_rxdma);
  662 }
  663 
  664 static void
  665 malo_txdma_cleanup(struct malo_softc *sc, struct malo_txq *txq)
  666 {
  667         struct malo_txbuf *bf;
  668         struct ieee80211_node *ni;
  669 
  670         STAILQ_FOREACH(bf, &txq->free, bf_list) {
  671                 if (bf->bf_m != NULL) {
  672                         m_freem(bf->bf_m);
  673                         bf->bf_m = NULL;
  674                 }
  675                 ni = bf->bf_node;
  676                 bf->bf_node = NULL;
  677                 if (ni != NULL) {
  678                         /*
  679                          * Reclaim node reference.
  680                          */
  681                         ieee80211_free_node(ni);
  682                 }
  683                 if (bf->bf_dmamap != NULL) {
  684                         bus_dmamap_destroy(sc->malo_dmat, bf->bf_dmamap);
  685                         bf->bf_dmamap = NULL;
  686                 }
  687         }
  688         STAILQ_INIT(&txq->free);
  689         txq->nfree = 0;
  690         if (txq->dma.dd_bufptr != NULL) {
  691                 free(txq->dma.dd_bufptr, M_MALODEV);
  692                 txq->dma.dd_bufptr = NULL;
  693         }
  694         if (txq->dma.dd_desc_len != 0)
  695                 malo_desc_cleanup(sc, &txq->dma);
  696 }
  697 
  698 static void
  699 malo_dma_cleanup(struct malo_softc *sc)
  700 {
  701         int i;
  702 
  703         for (i = 0; i < MALO_NUM_TX_QUEUES; i++)
  704                 malo_txdma_cleanup(sc, &sc->malo_txq[i]);
  705 
  706         malo_rxdma_cleanup(sc);
  707 }
  708 
  709 static int
  710 malo_dma_setup(struct malo_softc *sc)
  711 {
  712         int error, i;
  713 
  714         /* rxdma initializing.  */
  715         error = malo_rxdma_setup(sc);
  716         if (error != 0)
  717                 return error;
  718 
  719         /* NB: we just have 1 tx queue now.  */
  720         for (i = 0; i < MALO_NUM_TX_QUEUES; i++) {
  721                 error = malo_txdma_setup(sc, &sc->malo_txq[i]);
  722                 if (error != 0) {
  723                         malo_dma_cleanup(sc);
  724 
  725                         return error;
  726                 }
  727 
  728                 malo_txq_init(sc, &sc->malo_txq[i], i);
  729         }
  730 
  731         return 0;
  732 }
  733 
  734 static void
  735 malo_hal_set_rxtxdma(struct malo_softc *sc)
  736 {
  737         int i;
  738 
  739         malo_bar0_write4(sc, sc->malo_hwspecs.rxdesc_read,
  740             sc->malo_hwdma.rxdesc_read);
  741         malo_bar0_write4(sc, sc->malo_hwspecs.rxdesc_write,
  742             sc->malo_hwdma.rxdesc_read);
  743 
  744         for (i = 0; i < MALO_NUM_TX_QUEUES; i++) {
  745                 malo_bar0_write4(sc,
  746                     sc->malo_hwspecs.wcbbase[i], sc->malo_hwdma.wcbbase[i]);
  747         }
  748 }
  749 
  750 /*
  751  * Inform firmware of our tx/rx dma setup.  The BAR 0 writes below are
  752  * for compatibility with older firmware.  For current firmware we send
  753  * this information with a cmd block via malo_hal_sethwdma.
  754  */
  755 static int
  756 malo_setup_hwdma(struct malo_softc *sc)
  757 {
  758         int i;
  759         struct malo_txq *txq;
  760 
  761         sc->malo_hwdma.rxdesc_read = sc->malo_rxdma.dd_desc_paddr;
  762 
  763         for (i = 0; i < MALO_NUM_TX_QUEUES; i++) {
  764                 txq = &sc->malo_txq[i];
  765                 sc->malo_hwdma.wcbbase[i] = txq->dma.dd_desc_paddr;
  766         }
  767         sc->malo_hwdma.maxnum_txwcb = malo_txbuf;
  768         sc->malo_hwdma.maxnum_wcb = MALO_NUM_TX_QUEUES;
  769 
  770         malo_hal_set_rxtxdma(sc);
  771 
  772         return 0;
  773 }
  774 
  775 static void
  776 malo_txq_init(struct malo_softc *sc, struct malo_txq *txq, int qnum)
  777 {
  778         struct malo_txbuf *bf, *bn;
  779         struct malo_txdesc *ds;
  780 
  781         MALO_TXQ_LOCK_INIT(sc, txq);
  782         txq->qnum = qnum;
  783         txq->txpri = 0; /* XXX */
  784 
  785         STAILQ_FOREACH(bf, &txq->free, bf_list) {
  786                 bf->bf_txq = txq;
  787 
  788                 ds = bf->bf_desc;
  789                 bn = STAILQ_NEXT(bf, bf_list);
  790                 if (bn == NULL)
  791                         bn = STAILQ_FIRST(&txq->free);
  792                 ds->physnext = htole32(bn->bf_daddr);
  793         }
  794         STAILQ_INIT(&txq->active);
  795 }
  796 
  797 /*
  798  * Reclaim resources for a setup queue.
  799  */
  800 static void
  801 malo_tx_cleanupq(struct malo_softc *sc, struct malo_txq *txq)
  802 {
  803         /* XXX hal work? */
  804         MALO_TXQ_LOCK_DESTROY(txq);
  805 }
  806 
  807 /*
  808  * Allocate a tx buffer for sending a frame.
  809  */
  810 static struct malo_txbuf *
  811 malo_getbuf(struct malo_softc *sc, struct malo_txq *txq)
  812 {
  813         struct malo_txbuf *bf;
  814 
  815         MALO_TXQ_LOCK(txq);
  816         bf = STAILQ_FIRST(&txq->free);
  817         if (bf != NULL) {
  818                 STAILQ_REMOVE_HEAD(&txq->free, bf_list);
  819                 txq->nfree--;
  820         }
  821         MALO_TXQ_UNLOCK(txq);
  822         if (bf == NULL) {
  823                 DPRINTF(sc, MALO_DEBUG_XMIT,
  824                     "%s: out of xmit buffers on q %d\n", __func__, txq->qnum);
  825                 sc->malo_stats.mst_tx_qstop++;
  826         }
  827         return bf;
  828 }
  829 
  830 static int
  831 malo_tx_dmasetup(struct malo_softc *sc, struct malo_txbuf *bf, struct mbuf *m0)
  832 {
  833         struct mbuf *m;
  834         int error;
  835 
  836         /*
  837          * Load the DMA map so any coalescing is done.  This also calculates
  838          * the number of descriptors we need.
  839          */
  840         error = bus_dmamap_load_mbuf_sg(sc->malo_dmat, bf->bf_dmamap, m0,
  841                                      bf->bf_segs, &bf->bf_nseg,
  842                                      BUS_DMA_NOWAIT);
  843         if (error == EFBIG) {
  844                 /* XXX packet requires too many descriptors */
  845                 bf->bf_nseg = MALO_TXDESC + 1;
  846         } else if (error != 0) {
  847                 sc->malo_stats.mst_tx_busdma++;
  848                 m_freem(m0);
  849                 return error;
  850         }
  851         /*
  852          * Discard null packets and check for packets that require too many
  853          * TX descriptors.  We try to convert the latter to a cluster.
  854          */
  855         if (error == EFBIG) {           /* too many desc's, linearize */
  856                 sc->malo_stats.mst_tx_linear++;
  857                 m = m_defrag(m0, M_DONTWAIT);
  858                 if (m == NULL) {
  859                         m_freem(m0);
  860                         sc->malo_stats.mst_tx_nombuf++;
  861                         return ENOMEM;
  862                 }
  863                 m0 = m;
  864                 error = bus_dmamap_load_mbuf_sg(sc->malo_dmat, bf->bf_dmamap, m0,
  865                                              bf->bf_segs, &bf->bf_nseg,
  866                                              BUS_DMA_NOWAIT);
  867                 if (error != 0) {
  868                         sc->malo_stats.mst_tx_busdma++;
  869                         m_freem(m0);
  870                         return error;
  871                 }
  872                 KASSERT(bf->bf_nseg <= MALO_TXDESC,
  873                     ("too many segments after defrag; nseg %u", bf->bf_nseg));
  874         } else if (bf->bf_nseg == 0) {          /* null packet, discard */
  875                 sc->malo_stats.mst_tx_nodata++;
  876                 m_freem(m0);
  877                 return EIO;
  878         }
  879         DPRINTF(sc, MALO_DEBUG_XMIT, "%s: m %p len %u\n",
  880                 __func__, m0, m0->m_pkthdr.len);
  881         bus_dmamap_sync(sc->malo_dmat, bf->bf_dmamap, BUS_DMASYNC_PREWRITE);
  882         bf->bf_m = m0;
  883 
  884         return 0;
  885 }
  886 
  887 #ifdef MALO_DEBUG
  888 static void
  889 malo_printrxbuf(const struct malo_rxbuf *bf, u_int ix)
  890 {
  891         const struct malo_rxdesc *ds = bf->bf_desc;
  892         uint32_t status = le32toh(ds->status);
  893         
  894         printf("R[%2u] (DS.V:%p DS.P:%p) NEXT:%08x DATA:%08x RC:%02x%s\n"
  895             "      STAT:%02x LEN:%04x SNR:%02x NF:%02x CHAN:%02x"
  896             " RATE:%02x QOS:%04x\n",
  897             ix, ds, (const struct malo_desc *)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:%p)\n",
  914             ds, (const struct malo_txdesc *)bf->bf_daddr);
  915         printf("    NEXT:%08x DATA:%08x LEN:%04x STAT:%08x%s\n",
  916             le32toh(ds->physnext),
  917             le32toh(ds->pktptr), le16toh(ds->pktlen), status,
  918             status & MALO_TXD_STATUS_USED ?
  919             "" : (status & 3) != 0 ? " *" : " !");
  920         printf("    RATE:%02x PRI:%x QOS:%04x SAP:%08x FORMAT:%04x\n",
  921             ds->datarate, ds->txpriority, le16toh(ds->qosctrl),
  922             le32toh(ds->sap_pktinfo), le16toh(ds->format));
  923 #if 0
  924         {
  925                 const uint8_t *cp = (const uint8_t *) ds;
  926                 int i;
  927                 for (i = 0; i < sizeof(struct malo_txdesc); i++) {
  928                         printf("%02x ", cp[i]);
  929                         if (((i+1) % 16) == 0)
  930                                 printf("\n");
  931                 }
  932                 printf("\n");
  933         }
  934 #endif
  935 }
  936 #endif /* MALO_DEBUG */
  937 
  938 static __inline void
  939 malo_updatetxrate(struct ieee80211_node *ni, int rix)
  940 {
  941 #define N(x)    (sizeof(x)/sizeof(x[0]))
  942         static const int ieeerates[] =
  943             { 2, 4, 11, 22, 44, 12, 18, 24, 36, 48, 96, 108 };
  944         if (rix < N(ieeerates))
  945                 ni->ni_txrate = ieeerates[rix];
  946 #undef N
  947 }
  948 
  949 static int
  950 malo_fix2rate(int fix_rate)
  951 {
  952 #define N(x)    (sizeof(x)/sizeof(x[0]))
  953         static const int rates[] =
  954             { 2, 4, 11, 22, 12, 18, 24, 36, 48, 96, 108 };
  955         return (fix_rate < N(rates) ? rates[fix_rate] : 0);
  956 #undef N
  957 }
  958 
  959 /* idiomatic shorthands: MS = mask+shift, SM = shift+mask */
  960 #define MS(v,x)                 (((v) & x) >> x##_S)
  961 #define SM(v,x)                 (((v) << x##_S) & x)
  962 
  963 /*
  964  * Process completed xmit descriptors from the specified queue.
  965  */
  966 static int
  967 malo_tx_processq(struct malo_softc *sc, struct malo_txq *txq)
  968 {
  969         struct malo_txbuf *bf;
  970         struct malo_txdesc *ds;
  971         struct ieee80211_node *ni;
  972         int nreaped;
  973         uint32_t status;
  974 
  975         DPRINTF(sc, MALO_DEBUG_TX_PROC, "%s: tx queue %u\n",
  976             __func__, txq->qnum);
  977         for (nreaped = 0;; nreaped++) {
  978                 MALO_TXQ_LOCK(txq);
  979                 bf = STAILQ_FIRST(&txq->active);
  980                 if (bf == NULL) {
  981                         MALO_TXQ_UNLOCK(txq);
  982                         break;
  983                 }
  984                 ds = bf->bf_desc;
  985                 MALO_TXDESC_SYNC(txq, ds,
  986                     BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
  987                 if (ds->status & htole32(MALO_TXD_STATUS_FW_OWNED)) {
  988                         MALO_TXQ_UNLOCK(txq);
  989                         break;
  990                 }
  991                 STAILQ_REMOVE_HEAD(&txq->active, bf_list);
  992                 MALO_TXQ_UNLOCK(txq);
  993 
  994 #ifdef MALO_DEBUG
  995                 if (sc->malo_debug & MALO_DEBUG_XMIT_DESC)
  996                         malo_printtxbuf(bf, txq->qnum, nreaped);
  997 #endif
  998                 ni = bf->bf_node;
  999                 if (ni != NULL) {
 1000                         status = le32toh(ds->status);
 1001                         if (status & MALO_TXD_STATUS_OK) {
 1002                                 uint16_t format = le16toh(ds->format);
 1003                                 uint8_t txant = MS(format, MALO_TXD_ANTENNA);
 1004 
 1005                                 sc->malo_stats.mst_ant_tx[txant]++;
 1006                                 if (status & MALO_TXD_STATUS_OK_RETRY)
 1007                                         sc->malo_stats.mst_tx_retries++;
 1008                                 if (status & MALO_TXD_STATUS_OK_MORE_RETRY)
 1009                                         sc->malo_stats.mst_tx_mretries++;
 1010                                 malo_updatetxrate(ni, ds->datarate);
 1011                                 sc->malo_stats.mst_tx_rate = ds->datarate;
 1012                         } else {
 1013                                 if (status & MALO_TXD_STATUS_FAILED_LINK_ERROR)
 1014                                         sc->malo_stats.mst_tx_linkerror++;
 1015                                 if (status & MALO_TXD_STATUS_FAILED_XRETRY)
 1016                                         sc->malo_stats.mst_tx_xretries++;
 1017                                 if (status & MALO_TXD_STATUS_FAILED_AGING)
 1018                                         sc->malo_stats.mst_tx_aging++;
 1019                         }
 1020                         /*
 1021                          * Do any tx complete callback.  Note this must
 1022                          * be done before releasing the node reference.
 1023                          * XXX no way to figure out if frame was ACK'd
 1024                          */
 1025                         if (bf->bf_m->m_flags & M_TXCB) {
 1026                                 /* XXX strip fw len in case header inspected */
 1027                                 m_adj(bf->bf_m, sizeof(uint16_t));
 1028                                 ieee80211_process_callback(ni, bf->bf_m,
 1029                                         (status & MALO_TXD_STATUS_OK) == 0);
 1030                         }
 1031                         /*
 1032                          * Reclaim reference to node.
 1033                          *
 1034                          * NB: the node may be reclaimed here if, for example
 1035                          *     this is a DEAUTH message that was sent and the
 1036                          *     node was timed out due to inactivity.
 1037                          */
 1038                         ieee80211_free_node(ni);
 1039                 }
 1040                 ds->status = htole32(MALO_TXD_STATUS_IDLE);
 1041                 ds->pktlen = htole32(0);
 1042 
 1043                 bus_dmamap_sync(sc->malo_dmat, bf->bf_dmamap,
 1044                     BUS_DMASYNC_POSTWRITE);
 1045                 bus_dmamap_unload(sc->malo_dmat, bf->bf_dmamap);
 1046                 m_freem(bf->bf_m);
 1047                 bf->bf_m = NULL;
 1048                 bf->bf_node = NULL;
 1049 
 1050                 MALO_TXQ_LOCK(txq);
 1051                 STAILQ_INSERT_TAIL(&txq->free, bf, bf_list);
 1052                 txq->nfree++;
 1053                 MALO_TXQ_UNLOCK(txq);
 1054         }
 1055         return nreaped;
 1056 }
 1057 
 1058 /*
 1059  * Deferred processing of transmit interrupt.
 1060  */
 1061 static void
 1062 malo_tx_proc(void *arg, int npending)
 1063 {
 1064         struct malo_softc *sc = arg;
 1065         struct ifnet *ifp = sc->malo_ifp;
 1066         int i, nreaped;
 1067 
 1068         /*
 1069          * Process each active queue.
 1070          */
 1071         nreaped = 0;
 1072         for (i = 0; i < MALO_NUM_TX_QUEUES; i++) {
 1073                 if (!STAILQ_EMPTY(&sc->malo_txq[i].active))
 1074                         nreaped += malo_tx_processq(sc, &sc->malo_txq[i]);
 1075         }
 1076 
 1077         if (nreaped != 0) {
 1078                 ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
 1079                 ifp->if_timer = 0;
 1080                 malo_start(ifp);
 1081         }
 1082 }
 1083 
 1084 static int
 1085 malo_tx_start(struct malo_softc *sc, struct ieee80211_node *ni,
 1086     struct malo_txbuf *bf, struct mbuf *m0)
 1087 {
 1088 #define IEEE80211_DIR_DSTODS(wh) \
 1089         ((wh->i_fc[1] & IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS)
 1090 #define IS_DATA_FRAME(wh)                                               \
 1091         ((wh->i_fc[0] & (IEEE80211_FC0_TYPE_MASK)) == IEEE80211_FC0_TYPE_DATA)
 1092         int error, ismcast, iswep;
 1093         int copyhdrlen, hdrlen, pktlen;
 1094         struct ieee80211_frame *wh;
 1095         struct ifnet *ifp = sc->malo_ifp;
 1096         struct ieee80211com *ic = ifp->if_l2com;
 1097         struct ieee80211vap *vap = ni->ni_vap;
 1098         struct malo_txdesc *ds;
 1099         struct malo_txrec *tr;
 1100         struct malo_txq *txq;
 1101         uint16_t qos;
 1102 
 1103         wh = mtod(m0, struct ieee80211_frame *);
 1104         iswep = wh->i_fc[1] & IEEE80211_FC1_WEP;
 1105         ismcast = IEEE80211_IS_MULTICAST(wh->i_addr1);
 1106         copyhdrlen = hdrlen = ieee80211_anyhdrsize(wh);
 1107         pktlen = m0->m_pkthdr.len;
 1108         if (IEEE80211_QOS_HAS_SEQ(wh)) {
 1109                 if (IEEE80211_DIR_DSTODS(wh)) {
 1110                         qos = *(uint16_t *)
 1111                             (((struct ieee80211_qosframe_addr4 *) wh)->i_qos);
 1112                         copyhdrlen -= sizeof(qos);
 1113                 } else
 1114                         qos = *(uint16_t *)
 1115                             (((struct ieee80211_qosframe *) wh)->i_qos);
 1116         } else
 1117                 qos = 0;
 1118 
 1119         if (iswep) {
 1120                 struct ieee80211_key *k;
 1121 
 1122                 /*
 1123                  * Construct the 802.11 header+trailer for an encrypted
 1124                  * frame. The only reason this can fail is because of an
 1125                  * unknown or unsupported cipher/key type.
 1126                  *
 1127                  * NB: we do this even though the firmware will ignore
 1128                  *     what we've done for WEP and TKIP as we need the
 1129                  *     ExtIV filled in for CCMP and this also adjusts
 1130                  *     the headers which simplifies our work below.
 1131                  */
 1132                 k = ieee80211_crypto_encap(ni, m0);
 1133                 if (k == NULL) {
 1134                         /*
 1135                          * This can happen when the key is yanked after the
 1136                          * frame was queued.  Just discard the frame; the
 1137                          * 802.11 layer counts failures and provides
 1138                          * debugging/diagnostics.
 1139                          */
 1140                         m_freem(m0);
 1141                         return EIO;
 1142                 }
 1143 
 1144                 /*
 1145                  * Adjust the packet length for the crypto additions
 1146                  * done during encap and any other bits that the f/w
 1147                  * will add later on.
 1148                  */
 1149                 pktlen = m0->m_pkthdr.len;
 1150 
 1151                 /* packet header may have moved, reset our local pointer */
 1152                 wh = mtod(m0, struct ieee80211_frame *);
 1153         }
 1154 
 1155         if (ieee80211_radiotap_active_vap(vap)) {
 1156                 sc->malo_tx_th.wt_flags = 0;    /* XXX */
 1157                 if (iswep)
 1158                         sc->malo_tx_th.wt_flags |= IEEE80211_RADIOTAP_F_WEP;
 1159                 sc->malo_tx_th.wt_txpower = ni->ni_txpower;
 1160                 sc->malo_tx_th.wt_antenna = sc->malo_txantenna;
 1161 
 1162                 ieee80211_radiotap_tx(vap, m0);
 1163         }
 1164 
 1165         /*
 1166          * Copy up/down the 802.11 header; the firmware requires
 1167          * we present a 2-byte payload length followed by a
 1168          * 4-address header (w/o QoS), followed (optionally) by
 1169          * any WEP/ExtIV header (but only filled in for CCMP).
 1170          * We are assured the mbuf has sufficient headroom to
 1171          * prepend in-place by the setup of ic_headroom in
 1172          * malo_attach.
 1173          */
 1174         if (hdrlen < sizeof(struct malo_txrec)) {
 1175                 const int space = sizeof(struct malo_txrec) - hdrlen;
 1176                 if (M_LEADINGSPACE(m0) < space) {
 1177                         /* NB: should never happen */
 1178                         device_printf(sc->malo_dev,
 1179                             "not enough headroom, need %d found %zd, "
 1180                             "m_flags 0x%x m_len %d\n",
 1181                             space, M_LEADINGSPACE(m0), m0->m_flags, m0->m_len);
 1182                         ieee80211_dump_pkt(ic,
 1183                             mtod(m0, const uint8_t *), m0->m_len, 0, -1);
 1184                         m_freem(m0);
 1185                         /* XXX stat */
 1186                         return EIO;
 1187                 }
 1188                 M_PREPEND(m0, space, M_NOWAIT);
 1189         }
 1190         tr = mtod(m0, struct malo_txrec *);
 1191         if (wh != (struct ieee80211_frame *) &tr->wh)
 1192                 ovbcopy(wh, &tr->wh, hdrlen);
 1193         /*
 1194          * Note: the "firmware length" is actually the length of the fully
 1195          * formed "802.11 payload".  That is, it's everything except for
 1196          * the 802.11 header.  In particular this includes all crypto
 1197          * material including the MIC!
 1198          */
 1199         tr->fwlen = htole16(pktlen - hdrlen);
 1200 
 1201         /*
 1202          * Load the DMA map so any coalescing is done.  This
 1203          * also calculates the number of descriptors we need.
 1204          */
 1205         error = malo_tx_dmasetup(sc, bf, m0);
 1206         if (error != 0)
 1207                 return error;
 1208         bf->bf_node = ni;                       /* NB: held reference */
 1209         m0 = bf->bf_m;                          /* NB: may have changed */
 1210         tr = mtod(m0, struct malo_txrec *);
 1211         wh = (struct ieee80211_frame *)&tr->wh;
 1212 
 1213         /*
 1214          * Formulate tx descriptor.
 1215          */
 1216         ds = bf->bf_desc;
 1217         txq = bf->bf_txq;
 1218 
 1219         ds->qosctrl = qos;                      /* NB: already little-endian */
 1220         ds->pktptr = htole32(bf->bf_segs[0].ds_addr);
 1221         ds->pktlen = htole16(bf->bf_segs[0].ds_len);
 1222         /* NB: pPhysNext setup once, don't touch */
 1223         ds->datarate = IS_DATA_FRAME(wh) ? 1 : 0;
 1224         ds->sap_pktinfo = 0;
 1225         ds->format = 0;
 1226 
 1227         /*
 1228          * Select transmit rate.
 1229          */
 1230         switch (wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK) {
 1231         case IEEE80211_FC0_TYPE_MGT:
 1232                 sc->malo_stats.mst_tx_mgmt++;
 1233                 /* fall thru... */
 1234         case IEEE80211_FC0_TYPE_CTL:
 1235                 ds->txpriority = 1;
 1236                 break;
 1237         case IEEE80211_FC0_TYPE_DATA:
 1238                 ds->txpriority = txq->qnum;
 1239                 break;
 1240         default:
 1241                 if_printf(ifp, "bogus frame type 0x%x (%s)\n",
 1242                         wh->i_fc[0] & IEEE80211_FC0_TYPE_MASK, __func__);
 1243                 /* XXX statistic */
 1244                 m_freem(m0);
 1245                 return EIO;
 1246         }
 1247 
 1248 #ifdef MALO_DEBUG
 1249         if (IFF_DUMPPKTS_XMIT(sc))
 1250                 ieee80211_dump_pkt(ic,
 1251                     mtod(m0, const uint8_t *)+sizeof(uint16_t),
 1252                     m0->m_len - sizeof(uint16_t), ds->datarate, -1);
 1253 #endif
 1254 
 1255         MALO_TXQ_LOCK(txq);
 1256         if (!IS_DATA_FRAME(wh))
 1257                 ds->status |= htole32(1);
 1258         ds->status |= htole32(MALO_TXD_STATUS_FW_OWNED);
 1259         STAILQ_INSERT_TAIL(&txq->active, bf, bf_list);
 1260         MALO_TXDESC_SYNC(txq, ds, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
 1261 
 1262         ifp->if_opackets++;
 1263         ifp->if_timer = 5;
 1264         MALO_TXQ_UNLOCK(txq);
 1265         return 0;
 1266 #undef IEEE80211_DIR_DSTODS
 1267 }
 1268 
 1269 static void
 1270 malo_start(struct ifnet *ifp)
 1271 {
 1272         struct malo_softc *sc = ifp->if_softc;
 1273         struct ieee80211_node *ni;
 1274         struct malo_txq *txq = &sc->malo_txq[0];
 1275         struct malo_txbuf *bf = NULL;
 1276         struct mbuf *m;
 1277         int nqueued = 0;
 1278 
 1279         if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || sc->malo_invalid)
 1280                 return;
 1281 
 1282         for (;;) {
 1283                 IFQ_DRV_DEQUEUE(&ifp->if_snd, m);
 1284                 if (m == NULL)
 1285                         break;
 1286                 ni = (struct ieee80211_node *) m->m_pkthdr.rcvif;
 1287                 bf = malo_getbuf(sc, txq);
 1288                 if (bf == NULL) {
 1289                         IFQ_DRV_PREPEND(&ifp->if_snd, m);
 1290 
 1291                         /* XXX blocks other traffic */
 1292                         ifp->if_drv_flags |= IFF_DRV_OACTIVE;
 1293                         sc->malo_stats.mst_tx_qstop++;
 1294                         break;
 1295                 }
 1296                 /*
 1297                  * Pass the frame to the h/w for transmission.
 1298                  */
 1299                 if (malo_tx_start(sc, ni, bf, m)) {
 1300                         ifp->if_oerrors++;
 1301                         if (bf != NULL) {
 1302                                 bf->bf_m = NULL;
 1303                                 bf->bf_node = NULL;
 1304                                 MALO_TXQ_LOCK(txq);
 1305                                 STAILQ_INSERT_HEAD(&txq->free, bf, bf_list);
 1306                                 MALO_TXQ_UNLOCK(txq);
 1307                         }
 1308                         ieee80211_free_node(ni);
 1309                         continue;
 1310                 }
 1311                 nqueued++;
 1312 
 1313                 if (nqueued >= malo_txcoalesce) {
 1314                         /*
 1315                          * Poke the firmware to process queued frames;
 1316                          * see below about (lack of) locking.
 1317                          */
 1318                         nqueued = 0;
 1319                         malo_hal_txstart(sc->malo_mh, 0/*XXX*/);
 1320                 }
 1321         }
 1322 
 1323         if (nqueued) {
 1324                 /*
 1325                  * NB: We don't need to lock against tx done because
 1326                  * this just prods the firmware to check the transmit
 1327                  * descriptors.  The firmware will also start fetching
 1328                  * descriptors by itself if it notices new ones are
 1329                  * present when it goes to deliver a tx done interrupt
 1330                  * to the host. So if we race with tx done processing
 1331                  * it's ok.  Delivering the kick here rather than in
 1332                  * malo_tx_start is an optimization to avoid poking the
 1333                  * firmware for each packet.
 1334                  *
 1335                  * NB: the queue id isn't used so 0 is ok.
 1336                  */
 1337                 malo_hal_txstart(sc->malo_mh, 0/*XXX*/);
 1338         }
 1339 }
 1340 
 1341 static void
 1342 malo_watchdog(struct ifnet *ifp)
 1343 {
 1344         struct malo_softc *sc = ifp->if_softc;
 1345 
 1346         if ((ifp->if_drv_flags & IFF_DRV_RUNNING) && !sc->malo_invalid) {
 1347                 if_printf(ifp, "watchdog timeout\n");
 1348 
 1349                 /* XXX no way to reset h/w. now  */
 1350 
 1351                 ifp->if_oerrors++;
 1352                 sc->malo_stats.mst_watchdog++;
 1353         }
 1354 }
 1355 
 1356 static int
 1357 malo_hal_reset(struct malo_softc *sc)
 1358 {
 1359         static int first = 0;
 1360         struct ifnet *ifp = sc->malo_ifp;
 1361         struct ieee80211com *ic = ifp->if_l2com;
 1362         struct malo_hal *mh = sc->malo_mh;
 1363 
 1364         if (first == 0) {
 1365                 /*
 1366                  * NB: when the device firstly is initialized, sometimes
 1367                  * firmware could override rx/tx dma registers so we re-set
 1368                  * these values once.
 1369                  */
 1370                 malo_hal_set_rxtxdma(sc);
 1371                 first = 1;
 1372         }
 1373 
 1374         malo_hal_setantenna(mh, MHA_ANTENNATYPE_RX, sc->malo_rxantenna);
 1375         malo_hal_setantenna(mh, MHA_ANTENNATYPE_TX, sc->malo_txantenna);
 1376         malo_hal_setradio(mh, 1, MHP_AUTO_PREAMBLE);
 1377         malo_chan_set(sc, ic->ic_curchan);
 1378 
 1379         /* XXX needs other stuffs?  */
 1380 
 1381         return 1;
 1382 }
 1383 
 1384 static __inline struct mbuf *
 1385 malo_getrxmbuf(struct malo_softc *sc, struct malo_rxbuf *bf)
 1386 {
 1387         struct mbuf *m;
 1388         bus_addr_t paddr;
 1389         int error;
 1390 
 1391         /* XXX don't need mbuf, just dma buffer */
 1392         m = m_getjcl(M_DONTWAIT, MT_DATA, M_PKTHDR, MJUMPAGESIZE);
 1393         if (m == NULL) {
 1394                 sc->malo_stats.mst_rx_nombuf++; /* XXX */
 1395                 return NULL;
 1396         }
 1397         error = bus_dmamap_load(sc->malo_dmat, bf->bf_dmamap,
 1398             mtod(m, caddr_t), MJUMPAGESIZE,
 1399             malo_load_cb, &paddr, BUS_DMA_NOWAIT);
 1400         if (error != 0) {
 1401                 if_printf(sc->malo_ifp,
 1402                     "%s: bus_dmamap_load failed, error %d\n", __func__, error);
 1403                 m_freem(m);
 1404                 return NULL;
 1405         }
 1406         bf->bf_data = paddr;
 1407         bus_dmamap_sync(sc->malo_dmat, bf->bf_dmamap, BUS_DMASYNC_PREWRITE);
 1408 
 1409         return m;
 1410 }
 1411 
 1412 static int
 1413 malo_rxbuf_init(struct malo_softc *sc, struct malo_rxbuf *bf)
 1414 {
 1415         struct malo_rxdesc *ds;
 1416 
 1417         ds = bf->bf_desc;
 1418         if (bf->bf_m == NULL) {
 1419                 bf->bf_m = malo_getrxmbuf(sc, bf);
 1420                 if (bf->bf_m == NULL) {
 1421                         /* mark descriptor to be skipped */
 1422                         ds->rxcontrol = MALO_RXD_CTRL_OS_OWN;
 1423                         /* NB: don't need PREREAD */
 1424                         MALO_RXDESC_SYNC(sc, ds, BUS_DMASYNC_PREWRITE);
 1425                         return ENOMEM;
 1426                 }
 1427         }
 1428 
 1429         /*
 1430          * Setup descriptor.
 1431          */
 1432         ds->qosctrl = 0;
 1433         ds->snr = 0;
 1434         ds->status = MALO_RXD_STATUS_IDLE;
 1435         ds->channel = 0;
 1436         ds->pktlen = htole16(MALO_RXSIZE);
 1437         ds->nf = 0;
 1438         ds->physbuffdata = htole32(bf->bf_data);
 1439         /* NB: don't touch pPhysNext, set once */
 1440         ds->rxcontrol = MALO_RXD_CTRL_DRIVER_OWN;
 1441         MALO_RXDESC_SYNC(sc, ds, BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
 1442 
 1443         return 0;
 1444 }
 1445 
 1446 /*
 1447  * Setup the rx data structures.  This should only be done once or we may get
 1448  * out of sync with the firmware.
 1449  */
 1450 static int
 1451 malo_startrecv(struct malo_softc *sc)
 1452 {
 1453         struct malo_rxbuf *bf, *prev;
 1454         struct malo_rxdesc *ds;
 1455         
 1456         if (sc->malo_recvsetup == 1) {
 1457                 malo_mode_init(sc);             /* set filters, etc. */
 1458                 return 0;
 1459         }
 1460         
 1461         prev = NULL;
 1462         STAILQ_FOREACH(bf, &sc->malo_rxbuf, bf_list) {
 1463                 int error = malo_rxbuf_init(sc, bf);
 1464                 if (error != 0) {
 1465                         DPRINTF(sc, MALO_DEBUG_RECV,
 1466                             "%s: malo_rxbuf_init failed %d\n",
 1467                             __func__, error);
 1468                         return error;
 1469                 }
 1470                 if (prev != NULL) {
 1471                         ds = prev->bf_desc;
 1472                         ds->physnext = htole32(bf->bf_daddr);
 1473                 }
 1474                 prev = bf;
 1475         }
 1476         if (prev != NULL) {
 1477                 ds = prev->bf_desc;
 1478                 ds->physnext =
 1479                     htole32(STAILQ_FIRST(&sc->malo_rxbuf)->bf_daddr);
 1480         }
 1481 
 1482         sc->malo_recvsetup = 1;
 1483 
 1484         malo_mode_init(sc);             /* set filters, etc. */
 1485         
 1486         return 0;
 1487 }
 1488 
 1489 static void
 1490 malo_init_locked(struct malo_softc *sc)
 1491 {
 1492         struct ifnet *ifp = sc->malo_ifp;
 1493         struct malo_hal *mh = sc->malo_mh;
 1494         int error;
 1495         
 1496         DPRINTF(sc, MALO_DEBUG_ANY, "%s: if_flags 0x%x\n",
 1497             __func__, ifp->if_flags);
 1498 
 1499         MALO_LOCK_ASSERT(sc);
 1500         
 1501         /*
 1502          * Stop anything previously setup.  This is safe whether this is
 1503          * the first time through or not.
 1504          */
 1505         malo_stop_locked(ifp, 0);
 1506 
 1507         /*
 1508          * Push state to the firmware.
 1509          */
 1510         if (!malo_hal_reset(sc)) {
 1511                 if_printf(ifp, "%s: unable to reset hardware\n", __func__);
 1512                 return;
 1513         }
 1514 
 1515         /*
 1516          * Setup recv (once); transmit is already good to go.
 1517          */
 1518         error = malo_startrecv(sc);
 1519         if (error != 0) {
 1520                 if_printf(ifp, "%s: unable to start recv logic, error %d\n",
 1521                     __func__, error);
 1522                 return;
 1523         }
 1524 
 1525         /*
 1526          * Enable interrupts.
 1527          */
 1528         sc->malo_imask = MALO_A2HRIC_BIT_RX_RDY
 1529             | MALO_A2HRIC_BIT_TX_DONE
 1530             | MALO_A2HRIC_BIT_OPC_DONE
 1531             | MALO_A2HRIC_BIT_MAC_EVENT
 1532             | MALO_A2HRIC_BIT_RX_PROBLEM
 1533             | MALO_A2HRIC_BIT_ICV_ERROR
 1534             | MALO_A2HRIC_BIT_RADAR_DETECT
 1535             | MALO_A2HRIC_BIT_CHAN_SWITCH;
 1536 
 1537         ifp->if_drv_flags |= IFF_DRV_RUNNING;
 1538         malo_hal_intrset(mh, sc->malo_imask);
 1539 }
 1540 
 1541 static void
 1542 malo_init(void *arg)
 1543 {
 1544         struct malo_softc *sc = (struct malo_softc *) arg;
 1545         struct ifnet *ifp = sc->malo_ifp;
 1546         struct ieee80211com *ic = ifp->if_l2com;
 1547         
 1548         DPRINTF(sc, MALO_DEBUG_ANY, "%s: if_flags 0x%x\n",
 1549             __func__, ifp->if_flags);
 1550 
 1551         MALO_LOCK(sc);
 1552         malo_init_locked(sc);
 1553 
 1554         MALO_UNLOCK(sc);
 1555 
 1556         if (ifp->if_drv_flags & IFF_DRV_RUNNING)
 1557                 ieee80211_start_all(ic);        /* start all vap's */
 1558 }
 1559 
 1560 /*
 1561  * Set the multicast filter contents into the hardware.
 1562  */
 1563 static void
 1564 malo_setmcastfilter(struct malo_softc *sc)
 1565 {
 1566         struct ifnet *ifp = sc->malo_ifp;
 1567         struct ieee80211com *ic = ifp->if_l2com;
 1568         struct ifmultiaddr *ifma;
 1569         uint8_t macs[IEEE80211_ADDR_LEN * MALO_HAL_MCAST_MAX];
 1570         uint8_t *mp;
 1571         int nmc;
 1572 
 1573         mp = macs;
 1574         nmc = 0;
 1575 
 1576         if (ic->ic_opmode == IEEE80211_M_MONITOR ||
 1577             (ifp->if_flags & (IFF_ALLMULTI | IFF_PROMISC)))
 1578                 goto all;
 1579         
 1580         if_maddr_rlock(ifp);
 1581         TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
 1582                 if (ifma->ifma_addr->sa_family != AF_LINK)
 1583                         continue;
 1584 
 1585                 if (nmc == MALO_HAL_MCAST_MAX) {
 1586                         ifp->if_flags |= IFF_ALLMULTI;
 1587                         if_maddr_runlock(ifp);
 1588                         goto all;
 1589                 }
 1590                 IEEE80211_ADDR_COPY(mp,
 1591                     LLADDR((struct sockaddr_dl *)ifma->ifma_addr));
 1592 
 1593                 mp += IEEE80211_ADDR_LEN, nmc++;
 1594         }
 1595         if_maddr_runlock(ifp);
 1596 
 1597         malo_hal_setmcast(sc->malo_mh, nmc, macs);
 1598 
 1599 all:
 1600         /*
 1601          * XXX we don't know how to set the f/w for supporting
 1602          * IFF_ALLMULTI | IFF_PROMISC cases
 1603          */
 1604         return;
 1605 }
 1606 
 1607 static int
 1608 malo_mode_init(struct malo_softc *sc)
 1609 {
 1610         struct ifnet *ifp = sc->malo_ifp;
 1611         struct ieee80211com *ic = ifp->if_l2com;
 1612         struct malo_hal *mh = sc->malo_mh;
 1613 
 1614         /*
 1615          * NB: Ignore promisc in hostap mode; it's set by the
 1616          * bridge.  This is wrong but we have no way to
 1617          * identify internal requests (from the bridge)
 1618          * versus external requests such as for tcpdump.
 1619          */
 1620         malo_hal_setpromisc(mh, (ifp->if_flags & IFF_PROMISC) &&
 1621             ic->ic_opmode != IEEE80211_M_HOSTAP);
 1622         malo_setmcastfilter(sc);
 1623 
 1624         return ENXIO;
 1625 }
 1626 
 1627 static void
 1628 malo_tx_draintxq(struct malo_softc *sc, struct malo_txq *txq)
 1629 {
 1630         struct ieee80211_node *ni;
 1631         struct malo_txbuf *bf;
 1632         u_int ix;
 1633         
 1634         /*
 1635          * NB: this assumes output has been stopped and
 1636          *     we do not need to block malo_tx_tasklet
 1637          */
 1638         for (ix = 0;; ix++) {
 1639                 MALO_TXQ_LOCK(txq);
 1640                 bf = STAILQ_FIRST(&txq->active);
 1641                 if (bf == NULL) {
 1642                         MALO_TXQ_UNLOCK(txq);
 1643                         break;
 1644                 }
 1645                 STAILQ_REMOVE_HEAD(&txq->active, bf_list);
 1646                 MALO_TXQ_UNLOCK(txq);
 1647 #ifdef MALO_DEBUG
 1648                 if (sc->malo_debug & MALO_DEBUG_RESET) {
 1649                         struct ifnet *ifp = sc->malo_ifp;
 1650                         struct ieee80211com *ic = ifp->if_l2com;
 1651                         const struct malo_txrec *tr =
 1652                             mtod(bf->bf_m, const struct malo_txrec *);
 1653                         malo_printtxbuf(bf, txq->qnum, ix);
 1654                         ieee80211_dump_pkt(ic, (const uint8_t *)&tr->wh,
 1655                             bf->bf_m->m_len - sizeof(tr->fwlen), 0, -1);
 1656                 }
 1657 #endif /* MALO_DEBUG */
 1658                 bus_dmamap_unload(sc->malo_dmat, bf->bf_dmamap);
 1659                 ni = bf->bf_node;
 1660                 bf->bf_node = NULL;
 1661                 if (ni != NULL) {
 1662                         /*
 1663                          * Reclaim node reference.
 1664                          */
 1665                         ieee80211_free_node(ni);
 1666                 }
 1667                 m_freem(bf->bf_m);
 1668                 bf->bf_m = NULL;
 1669                 
 1670                 MALO_TXQ_LOCK(txq);
 1671                 STAILQ_INSERT_TAIL(&txq->free, bf, bf_list);
 1672                 txq->nfree++;
 1673                 MALO_TXQ_UNLOCK(txq);
 1674         }
 1675 }
 1676 
 1677 static void
 1678 malo_stop_locked(struct ifnet *ifp, int disable)
 1679 {
 1680         struct malo_softc *sc = ifp->if_softc;
 1681         struct malo_hal *mh = sc->malo_mh;
 1682         int i;
 1683 
 1684         DPRINTF(sc, MALO_DEBUG_ANY, "%s: invalid %u if_flags 0x%x\n",
 1685             __func__, sc->malo_invalid, ifp->if_flags);
 1686 
 1687         MALO_LOCK_ASSERT(sc);
 1688 
 1689         if (!(ifp->if_drv_flags & IFF_DRV_RUNNING))
 1690                 return;
 1691 
 1692         /*
 1693          * Shutdown the hardware and driver:
 1694          *    disable interrupts
 1695          *    turn off the radio
 1696          *    drain and release tx queues
 1697          *
 1698          * Note that some of this work is not possible if the hardware
 1699          * is gone (invalid).
 1700          */
 1701         ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
 1702         ifp->if_timer = 0;
 1703         /* diable interrupt.  */
 1704         malo_hal_intrset(mh, 0);
 1705         /* turn off the radio.  */
 1706         malo_hal_setradio(mh, 0, MHP_AUTO_PREAMBLE);
 1707 
 1708         /* drain and release tx queues.  */
 1709         for (i = 0; i < MALO_NUM_TX_QUEUES; i++)
 1710                 malo_tx_draintxq(sc, &sc->malo_txq[i]);
 1711 }
 1712 
 1713 static int
 1714 malo_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
 1715 {
 1716 #define MALO_IS_RUNNING(ifp) \
 1717         ((ifp->if_flags & IFF_UP) && (ifp->if_drv_flags & IFF_DRV_RUNNING))
 1718         struct malo_softc *sc = ifp->if_softc;
 1719         struct ieee80211com *ic = ifp->if_l2com;
 1720         struct ifreq *ifr = (struct ifreq *) data;
 1721         int error = 0, startall = 0;
 1722 
 1723         MALO_LOCK(sc);
 1724         switch (cmd) {
 1725         case SIOCSIFFLAGS:
 1726                 if (MALO_IS_RUNNING(ifp)) {
 1727                         /*
 1728                          * To avoid rescanning another access point,
 1729                          * do not call malo_init() here.  Instead,
 1730                          * only reflect promisc mode settings.
 1731                          */
 1732                         malo_mode_init(sc);
 1733                 } else if (ifp->if_flags & IFF_UP) {
 1734                         /*
 1735                          * Beware of being called during attach/detach
 1736                          * to reset promiscuous mode.  In that case we
 1737                          * will still be marked UP but not RUNNING.
 1738                          * However trying to re-init the interface
 1739                          * is the wrong thing to do as we've already
 1740                          * torn down much of our state.  There's
 1741                          * probably a better way to deal with this.
 1742                          */
 1743                         if (!sc->malo_invalid) {
 1744                                 malo_init_locked(sc);
 1745                                 startall = 1;
 1746                         }
 1747                 } else
 1748                         malo_stop_locked(ifp, 1);
 1749                 break;
 1750         case SIOCGIFMEDIA:
 1751         case SIOCSIFMEDIA:
 1752                 error = ifmedia_ioctl(ifp, ifr, &ic->ic_media, cmd);
 1753                 break;
 1754         default:
 1755                 error = ether_ioctl(ifp, cmd, data);
 1756                 break;
 1757         }
 1758         MALO_UNLOCK(sc);
 1759 
 1760         if (startall)
 1761                 ieee80211_start_all(ic);
 1762         return error;
 1763 #undef MALO_IS_RUNNING
 1764 }
 1765 
 1766 /*
 1767  * Callback from the 802.11 layer to update the slot time
 1768  * based on the current setting.  We use it to notify the
 1769  * firmware of ERP changes and the f/w takes care of things
 1770  * like slot time and preamble.
 1771  */
 1772 static void
 1773 malo_updateslot(struct ifnet *ifp)
 1774 {
 1775         struct malo_softc *sc = ifp->if_softc;
 1776         struct ieee80211com *ic = ifp->if_l2com;
 1777         struct malo_hal *mh = sc->malo_mh;
 1778         int error;
 1779         
 1780         /* NB: can be called early; suppress needless cmds */
 1781         if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
 1782                 return;
 1783 
 1784         DPRINTF(sc, MALO_DEBUG_RESET,
 1785             "%s: chan %u MHz/flags 0x%x %s slot, (ic_flags 0x%x)\n",
 1786             __func__, ic->ic_curchan->ic_freq, ic->ic_curchan->ic_flags,
 1787             ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long", ic->ic_flags);
 1788 
 1789         if (ic->ic_flags & IEEE80211_F_SHSLOT)
 1790                 error = malo_hal_set_slot(mh, 1);
 1791         else
 1792                 error = malo_hal_set_slot(mh, 0);
 1793 
 1794         if (error != 0)
 1795                 device_printf(sc->malo_dev, "setting %s slot failed\n",
 1796                         ic->ic_flags & IEEE80211_F_SHSLOT ? "short" : "long");
 1797 }
 1798 
 1799 static int
 1800 malo_newstate(struct ieee80211vap *vap, enum ieee80211_state nstate, int arg)
 1801 {
 1802         struct ieee80211com *ic = vap->iv_ic;
 1803         struct malo_softc *sc = ic->ic_ifp->if_softc;
 1804         struct malo_hal *mh = sc->malo_mh;
 1805         int error;
 1806 
 1807         DPRINTF(sc, MALO_DEBUG_STATE, "%s: %s -> %s\n", __func__,
 1808             ieee80211_state_name[vap->iv_state],
 1809             ieee80211_state_name[nstate]);
 1810 
 1811         /*
 1812          * Invoke the net80211 layer first so iv_bss is setup.
 1813          */
 1814         error = MALO_VAP(vap)->malo_newstate(vap, nstate, arg);
 1815         if (error != 0)
 1816                 return error;
 1817 
 1818         if (nstate == IEEE80211_S_RUN && vap->iv_state != IEEE80211_S_RUN) {
 1819                 struct ieee80211_node *ni = vap->iv_bss;
 1820                 enum ieee80211_phymode mode = ieee80211_chan2mode(ni->ni_chan);
 1821                 const struct ieee80211_txparam *tp = &vap->iv_txparms[mode];
 1822 
 1823                 DPRINTF(sc, MALO_DEBUG_STATE,
 1824                     "%s: %s(RUN): iv_flags 0x%08x bintvl %d bssid %s "
 1825                     "capinfo 0x%04x chan %d associd 0x%x mode %d rate %d\n",
 1826                     vap->iv_ifp->if_xname, __func__, vap->iv_flags,
 1827                     ni->ni_intval, ether_sprintf(ni->ni_bssid), ni->ni_capinfo,
 1828                     ieee80211_chan2ieee(ic, ic->ic_curchan),
 1829                     ni->ni_associd, mode, tp->ucastrate);
 1830 
 1831                 malo_hal_setradio(mh, 1,
 1832                     (ic->ic_flags & IEEE80211_F_SHPREAMBLE) ?
 1833                         MHP_SHORT_PREAMBLE : MHP_LONG_PREAMBLE);
 1834                 malo_hal_setassocid(sc->malo_mh, ni->ni_bssid, ni->ni_associd);
 1835                 malo_hal_set_rate(mh, mode, 
 1836                    tp->ucastrate == IEEE80211_FIXED_RATE_NONE ?
 1837                        0 : malo_fix2rate(tp->ucastrate));
 1838         }
 1839         return 0;
 1840 }
 1841 
 1842 static int
 1843 malo_raw_xmit(struct ieee80211_node *ni, struct mbuf *m,
 1844         const struct ieee80211_bpf_params *params)
 1845 {
 1846         struct ieee80211com *ic = ni->ni_ic;
 1847         struct ifnet *ifp = ic->ic_ifp;
 1848         struct malo_softc *sc = ifp->if_softc;
 1849         struct malo_txbuf *bf;
 1850         struct malo_txq *txq;
 1851 
 1852         if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || sc->malo_invalid) {
 1853                 ieee80211_free_node(ni);
 1854                 m_freem(m);
 1855                 return ENETDOWN;
 1856         }
 1857 
 1858         /*
 1859          * Grab a TX buffer and associated resources.  Note that we depend
 1860          * on the classification by the 802.11 layer to get to the right h/w
 1861          * queue.  Management frames must ALWAYS go on queue 1 but we
 1862          * cannot just force that here because we may receive non-mgt frames.
 1863          */
 1864         txq = &sc->malo_txq[0];
 1865         bf = malo_getbuf(sc, txq);
 1866         if (bf == NULL) {
 1867                 /* XXX blocks other traffic */
 1868                 ifp->if_drv_flags |= IFF_DRV_OACTIVE;
 1869                 ieee80211_free_node(ni);
 1870                 m_freem(m);
 1871                 return ENOBUFS;
 1872         }
 1873 
 1874         /*
 1875          * Pass the frame to the h/w for transmission.
 1876          */
 1877         if (malo_tx_start(sc, ni, bf, m) != 0) {
 1878                 ifp->if_oerrors++;
 1879                 bf->bf_m = NULL;
 1880                 bf->bf_node = NULL;
 1881                 MALO_TXQ_LOCK(txq);
 1882                 STAILQ_INSERT_HEAD(&txq->free, bf, bf_list);
 1883                 txq->nfree++;
 1884                 MALO_TXQ_UNLOCK(txq);
 1885 
 1886                 ieee80211_free_node(ni);
 1887                 return EIO;             /* XXX */
 1888         }
 1889 
 1890         /*
 1891          * NB: We don't need to lock against tx done because this just
 1892          * prods the firmware to check the transmit descriptors.  The firmware
 1893          * will also start fetching descriptors by itself if it notices
 1894          * new ones are present when it goes to deliver a tx done interrupt
 1895          * to the host. So if we race with tx done processing it's ok.
 1896          * Delivering the kick here rather than in malo_tx_start is
 1897          * an optimization to avoid poking the firmware for each packet.
 1898          *
 1899          * NB: the queue id isn't used so 0 is ok.
 1900          */
 1901         malo_hal_txstart(sc->malo_mh, 0/*XXX*/);
 1902 
 1903         return 0;
 1904 }
 1905 
 1906 static void
 1907 malo_sysctlattach(struct malo_softc *sc)
 1908 {
 1909 #ifdef  MALO_DEBUG
 1910         struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(sc->malo_dev);
 1911         struct sysctl_oid *tree = device_get_sysctl_tree(sc->malo_dev);
 1912 
 1913         sc->malo_debug = malo_debug;
 1914         SYSCTL_ADD_INT(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
 1915                 "debug", CTLFLAG_RW, &sc->malo_debug, 0,
 1916                 "control debugging printfs");
 1917 #endif
 1918 }
 1919 
 1920 static void
 1921 malo_announce(struct malo_softc *sc)
 1922 {
 1923         struct ifnet *ifp = sc->malo_ifp;
 1924 
 1925         if_printf(ifp, "versions [hw %d fw %d.%d.%d.%d] (regioncode %d)\n",
 1926                 sc->malo_hwspecs.hwversion,
 1927                 (sc->malo_hwspecs.fw_releasenum >> 24) & 0xff,
 1928                 (sc->malo_hwspecs.fw_releasenum >> 16) & 0xff,
 1929                 (sc->malo_hwspecs.fw_releasenum >> 8) & 0xff,
 1930                 (sc->malo_hwspecs.fw_releasenum >> 0) & 0xff,
 1931                 sc->malo_hwspecs.regioncode);
 1932 
 1933         if (bootverbose || malo_rxbuf != MALO_RXBUF)
 1934                 if_printf(ifp, "using %u rx buffers\n", malo_rxbuf);
 1935         if (bootverbose || malo_txbuf != MALO_TXBUF)
 1936                 if_printf(ifp, "using %u tx buffers\n", malo_txbuf);
 1937 }
 1938 
 1939 /*
 1940  * Convert net80211 channel to a HAL channel.
 1941  */
 1942 static void
 1943 malo_mapchan(struct malo_hal_channel *hc, const struct ieee80211_channel *chan)
 1944 {
 1945         hc->channel = chan->ic_ieee;
 1946 
 1947         *(uint32_t *)&hc->flags = 0;
 1948         if (IEEE80211_IS_CHAN_2GHZ(chan))
 1949                 hc->flags.freqband = MALO_FREQ_BAND_2DOT4GHZ;
 1950 }
 1951 
 1952 /*
 1953  * Set/change channels.  If the channel is really being changed,
 1954  * it's done by reseting the chip.  To accomplish this we must
 1955  * first cleanup any pending DMA, then restart stuff after a la
 1956  * malo_init.
 1957  */
 1958 static int
 1959 malo_chan_set(struct malo_softc *sc, struct ieee80211_channel *chan)
 1960 {
 1961         struct malo_hal *mh = sc->malo_mh;
 1962         struct malo_hal_channel hchan;
 1963 
 1964         DPRINTF(sc, MALO_DEBUG_RESET, "%s: chan %u MHz/flags 0x%x\n",
 1965             __func__, chan->ic_freq, chan->ic_flags);
 1966 
 1967         /*
 1968          * Convert to a HAL channel description with the flags constrained
 1969          * to reflect the current operating mode.
 1970          */
 1971         malo_mapchan(&hchan, chan);
 1972         malo_hal_intrset(mh, 0);                /* disable interrupts */
 1973         malo_hal_setchannel(mh, &hchan);
 1974         malo_hal_settxpower(mh, &hchan);
 1975 
 1976         /*
 1977          * Update internal state.
 1978          */
 1979         sc->malo_tx_th.wt_chan_freq = htole16(chan->ic_freq);
 1980         sc->malo_rx_th.wr_chan_freq = htole16(chan->ic_freq);
 1981         if (IEEE80211_IS_CHAN_ANYG(chan)) {
 1982                 sc->malo_tx_th.wt_chan_flags = htole16(IEEE80211_CHAN_G);
 1983                 sc->malo_rx_th.wr_chan_flags = htole16(IEEE80211_CHAN_G);
 1984         } else {
 1985                 sc->malo_tx_th.wt_chan_flags = htole16(IEEE80211_CHAN_B);
 1986                 sc->malo_rx_th.wr_chan_flags = htole16(IEEE80211_CHAN_B);
 1987         }
 1988         sc->malo_curchan = hchan;
 1989         malo_hal_intrset(mh, sc->malo_imask);
 1990 
 1991         return 0;
 1992 }
 1993 
 1994 static void
 1995 malo_scan_start(struct ieee80211com *ic)
 1996 {
 1997         struct ifnet *ifp = ic->ic_ifp;
 1998         struct malo_softc *sc = ifp->if_softc;
 1999 
 2000         DPRINTF(sc, MALO_DEBUG_STATE, "%s\n", __func__);
 2001 }
 2002 
 2003 static void
 2004 malo_scan_end(struct ieee80211com *ic)
 2005 {
 2006         struct ifnet *ifp = ic->ic_ifp;
 2007         struct malo_softc *sc = ifp->if_softc;
 2008 
 2009         DPRINTF(sc, MALO_DEBUG_STATE, "%s\n", __func__);
 2010 }
 2011 
 2012 static void
 2013 malo_set_channel(struct ieee80211com *ic)
 2014 {
 2015         struct ifnet *ifp = ic->ic_ifp;
 2016         struct malo_softc *sc = ifp->if_softc;
 2017 
 2018         (void) malo_chan_set(sc, ic->ic_curchan);
 2019 }
 2020 
 2021 static void
 2022 malo_rx_proc(void *arg, int npending)
 2023 {
 2024 #define IEEE80211_DIR_DSTODS(wh)                                        \
 2025         ((((const struct ieee80211_frame *)wh)->i_fc[1] &               \
 2026             IEEE80211_FC1_DIR_MASK) == IEEE80211_FC1_DIR_DSTODS)
 2027         struct malo_softc *sc = arg;
 2028         struct ifnet *ifp = sc->malo_ifp;
 2029         struct ieee80211com *ic = ifp->if_l2com;
 2030         struct malo_rxbuf *bf;
 2031         struct malo_rxdesc *ds;
 2032         struct mbuf *m, *mnew;
 2033         struct ieee80211_qosframe *wh;
 2034         struct ieee80211_qosframe_addr4 *wh4;
 2035         struct ieee80211_node *ni;
 2036         int off, len, hdrlen, pktlen, rssi, ntodo;
 2037         uint8_t *data, status;
 2038         uint32_t readptr, writeptr;
 2039 
 2040         DPRINTF(sc, MALO_DEBUG_RX_PROC,
 2041             "%s: pending %u rdptr(0x%x) 0x%x wrptr(0x%x) 0x%x\n",
 2042             __func__, npending,
 2043             sc->malo_hwspecs.rxdesc_read,
 2044             malo_bar0_read4(sc, sc->malo_hwspecs.rxdesc_read),
 2045             sc->malo_hwspecs.rxdesc_write,
 2046             malo_bar0_read4(sc, sc->malo_hwspecs.rxdesc_write));
 2047 
 2048         readptr = malo_bar0_read4(sc, sc->malo_hwspecs.rxdesc_read);
 2049         writeptr = malo_bar0_read4(sc, sc->malo_hwspecs.rxdesc_write);
 2050         if (readptr == writeptr)
 2051                 return;
 2052 
 2053         bf = sc->malo_rxnext;
 2054         for (ntodo = malo_rxquota; ntodo > 0 && readptr != writeptr; ntodo--) {
 2055                 if (bf == NULL) {
 2056                         bf = STAILQ_FIRST(&sc->malo_rxbuf);
 2057                         break;
 2058                 }
 2059                 ds = bf->bf_desc;
 2060                 if (bf->bf_m == NULL) {
 2061                         /*
 2062                          * If data allocation failed previously there
 2063                          * will be no buffer; try again to re-populate it.
 2064                          * Note the firmware will not advance to the next
 2065                          * descriptor with a dma buffer so we must mimic
 2066                          * this or we'll get out of sync.
 2067                          */ 
 2068                         DPRINTF(sc, MALO_DEBUG_ANY,
 2069                             "%s: rx buf w/o dma memory\n", __func__);
 2070                         (void)malo_rxbuf_init(sc, bf);
 2071                         break;
 2072                 }
 2073                 MALO_RXDESC_SYNC(sc, ds,
 2074                     BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
 2075                 if (ds->rxcontrol != MALO_RXD_CTRL_DMA_OWN)
 2076                         break;
 2077 
 2078                 readptr = le32toh(ds->physnext);
 2079 
 2080 #ifdef MALO_DEBUG
 2081                 if (sc->malo_debug & MALO_DEBUG_RECV_DESC)
 2082                         malo_printrxbuf(bf, 0);
 2083 #endif
 2084                 status = ds->status;
 2085                 if (status & MALO_RXD_STATUS_DECRYPT_ERR_MASK) {
 2086                         ifp->if_ierrors++;
 2087                         goto rx_next;
 2088                 }
 2089                 /*
 2090                  * Sync the data buffer.
 2091                  */
 2092                 len = le16toh(ds->pktlen);
 2093                 bus_dmamap_sync(sc->malo_dmat, bf->bf_dmamap,
 2094                     BUS_DMASYNC_POSTREAD);
 2095                 /*
 2096                  * The 802.11 header is provided all or in part at the front;
 2097                  * use it to calculate the true size of the header that we'll
 2098                  * construct below.  We use this to figure out where to copy
 2099                  * payload prior to constructing the header.
 2100                  */
 2101                 m = bf->bf_m;
 2102                 data = mtod(m, uint8_t *);
 2103                 hdrlen = ieee80211_anyhdrsize(data + sizeof(uint16_t));
 2104                 off = sizeof(uint16_t) + sizeof(struct ieee80211_frame_addr4);
 2105 
 2106                 /*
 2107                  * Calculate RSSI. XXX wrong
 2108                  */
 2109                 rssi = 2 * ((int) ds->snr - ds->nf);    /* NB: .5 dBm  */
 2110                 if (rssi > 100)
 2111                         rssi = 100;
 2112 
 2113                 pktlen = hdrlen + (len - off);
 2114                 /*
 2115                  * NB: we know our frame is at least as large as
 2116                  * IEEE80211_MIN_LEN because there is a 4-address frame at
 2117                  * the front.  Hence there's no need to vet the packet length.
 2118                  * If the frame in fact is too small it should be discarded
 2119                  * at the net80211 layer.
 2120                  */
 2121 
 2122                 /* XXX don't need mbuf, just dma buffer */
 2123                 mnew = malo_getrxmbuf(sc, bf);
 2124                 if (mnew == NULL) {
 2125                         ifp->if_ierrors++;
 2126                         goto rx_next;
 2127                 }
 2128                 /*
 2129                  * Attach the dma buffer to the mbuf; malo_rxbuf_init will
 2130                  * re-setup the rx descriptor using the replacement dma
 2131                  * buffer we just installed above.
 2132                  */
 2133                 bf->bf_m = mnew;
 2134                 m->m_data += off - hdrlen;
 2135                 m->m_pkthdr.len = m->m_len = pktlen;
 2136                 m->m_pkthdr.rcvif = ifp;
 2137 
 2138                 /*
 2139                  * Piece 802.11 header together.
 2140                  */
 2141                 wh = mtod(m, struct ieee80211_qosframe *);
 2142                 /* NB: don't need to do this sometimes but ... */
 2143                 /* XXX special case so we can memcpy after m_devget? */
 2144                 ovbcopy(data + sizeof(uint16_t), wh, hdrlen);
 2145                 if (IEEE80211_QOS_HAS_SEQ(wh)) {
 2146                         if (IEEE80211_DIR_DSTODS(wh)) {
 2147                                 wh4 = mtod(m,
 2148                                     struct ieee80211_qosframe_addr4*);
 2149                                 *(uint16_t *)wh4->i_qos = ds->qosctrl;
 2150                         } else {
 2151                                 *(uint16_t *)wh->i_qos = ds->qosctrl;
 2152                         }
 2153                 }
 2154                 if (ieee80211_radiotap_active(ic)) {
 2155                         sc->malo_rx_th.wr_flags = 0;
 2156                         sc->malo_rx_th.wr_rate = ds->rate;
 2157                         sc->malo_rx_th.wr_antsignal = rssi;
 2158                         sc->malo_rx_th.wr_antnoise = ds->nf;
 2159                 }
 2160 #ifdef MALO_DEBUG
 2161                 if (IFF_DUMPPKTS_RECV(sc, wh)) {
 2162                         ieee80211_dump_pkt(ic, mtod(m, caddr_t),
 2163                             len, ds->rate, rssi);
 2164                 }
 2165 #endif
 2166                 ifp->if_ipackets++;
 2167                 
 2168                 /* dispatch */
 2169                 ni = ieee80211_find_rxnode(ic,
 2170                     (struct ieee80211_frame_min *)wh);
 2171                 if (ni != NULL) {
 2172                         (void) ieee80211_input(ni, m, rssi, ds->nf);
 2173                         ieee80211_free_node(ni);
 2174                 } else
 2175                         (void) ieee80211_input_all(ic, m, rssi, ds->nf);
 2176 rx_next:
 2177                 /* NB: ignore ENOMEM so we process more descriptors */
 2178                 (void) malo_rxbuf_init(sc, bf);
 2179                 bf = STAILQ_NEXT(bf, bf_list);
 2180         }
 2181         
 2182         malo_bar0_write4(sc, sc->malo_hwspecs.rxdesc_read, readptr);
 2183         sc->malo_rxnext = bf;
 2184 
 2185         if ((ifp->if_drv_flags & IFF_DRV_OACTIVE) == 0 &&
 2186             !IFQ_IS_EMPTY(&ifp->if_snd))
 2187                 malo_start(ifp);
 2188 #undef IEEE80211_DIR_DSTODS
 2189 }
 2190 
 2191 static void
 2192 malo_stop(struct ifnet *ifp, int disable)
 2193 {
 2194         struct malo_softc *sc = ifp->if_softc;
 2195 
 2196         MALO_LOCK(sc);
 2197         malo_stop_locked(ifp, disable);
 2198         MALO_UNLOCK(sc);
 2199 }
 2200 
 2201 /*
 2202  * Reclaim all tx queue resources.
 2203  */
 2204 static void
 2205 malo_tx_cleanup(struct malo_softc *sc)
 2206 {
 2207         int i;
 2208 
 2209         for (i = 0; i < MALO_NUM_TX_QUEUES; i++)
 2210                 malo_tx_cleanupq(sc, &sc->malo_txq[i]);
 2211 }
 2212 
 2213 int
 2214 malo_detach(struct malo_softc *sc)
 2215 {
 2216         struct ifnet *ifp = sc->malo_ifp;
 2217         struct ieee80211com *ic = ifp->if_l2com;
 2218 
 2219         DPRINTF(sc, MALO_DEBUG_ANY, "%s: if_flags %x\n",
 2220                 __func__, ifp->if_flags);
 2221 
 2222         malo_stop(ifp, 1);
 2223 
 2224         if (sc->malo_tq != NULL) {
 2225                 taskqueue_drain(sc->malo_tq, &sc->malo_rxtask);
 2226                 taskqueue_drain(sc->malo_tq, &sc->malo_txtask);
 2227                 taskqueue_free(sc->malo_tq);
 2228                 sc->malo_tq = NULL;
 2229         }
 2230 
 2231         /*
 2232          * NB: the order of these is important:
 2233          * o call the 802.11 layer before detaching the hal to
 2234          *   insure callbacks into the driver to delete global
 2235          *   key cache entries can be handled
 2236          * o reclaim the tx queue data structures after calling
 2237          *   the 802.11 layer as we'll get called back to reclaim
 2238          *   node state and potentially want to use them
 2239          * o to cleanup the tx queues the hal is called, so detach
 2240          *   it last
 2241          * Other than that, it's straightforward...
 2242          */
 2243         ieee80211_ifdetach(ic);
 2244         malo_dma_cleanup(sc);
 2245         malo_tx_cleanup(sc);
 2246         malo_hal_detach(sc->malo_mh);
 2247         if_free(ifp);
 2248 
 2249         MALO_LOCK_DESTROY(sc);
 2250 
 2251         return 0;
 2252 }
 2253 
 2254 void
 2255 malo_shutdown(struct malo_softc *sc)
 2256 {
 2257         malo_stop(sc->malo_ifp, 1);
 2258 }
 2259 
 2260 void
 2261 malo_suspend(struct malo_softc *sc)
 2262 {
 2263         struct ifnet *ifp = sc->malo_ifp;
 2264 
 2265         DPRINTF(sc, MALO_DEBUG_ANY, "%s: if_flags %x\n",
 2266                 __func__, ifp->if_flags);
 2267 
 2268         malo_stop(ifp, 1);
 2269 }
 2270 
 2271 void
 2272 malo_resume(struct malo_softc *sc)
 2273 {
 2274         struct ifnet *ifp = sc->malo_ifp;
 2275 
 2276         DPRINTF(sc, MALO_DEBUG_ANY, "%s: if_flags %x\n",
 2277                 __func__, ifp->if_flags);
 2278 
 2279         if (ifp->if_flags & IFF_UP)
 2280                 malo_init(sc);
 2281 }

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