net/madwifi/patches/448-beacon_handling_fixes.patch

   1 --- a/ath/if_ath.c
   2 +++ b/ath/if_ath.c
   3 @@ -160,7 +160,7 @@ static int ath_check_beacon_done(struct
   4  static void ath_beacon_send(struct ath_softc *, int *, uint64_t hw_tsf);
   5  static void ath_beacon_return(struct ath_softc *, struct ath_buf *);
   6  static void ath_beacon_free(struct ath_softc *);
   7 -static void ath_beacon_config(struct ath_softc *, struct ieee80211vap *);
   8 +static void ath_beacon_config(struct ath_softc *, struct ieee80211vap *, int);
   9  static void ath_hw_beacon_stop(struct ath_softc *sc);
  10  static int ath_desc_alloc(struct ath_softc *);
  11  static void ath_desc_free(struct ath_softc *);
  12 @@ -387,13 +387,11 @@ static void ath_set_timing(struct ath_so
  13  /* calibrate every 30 secs in steady state but check every second at first. */
  14  static int ath_calinterval = ATH_SHORT_CALINTERVAL;
  15  static int ath_xchanmode = AH_TRUE;            /* enable extended channels */
  16 -static int ath_maxvaps = ATH_MAXVAPS_DEFAULT;   /* set default maximum vaps */
  17  static int bstuck_thresh = BSTUCK_THRESH;       /* Stuck beacon count required for reset */
  18  static char *autocreate = NULL;
  19  static char *ratectl = DEF_RATE_CTL;
  20  static int rfkill = 0;
  21  static int tpc = 1;
  22 -static int maxvaps = -1;
  23  static int xchanmode = -1;
  24  #include "ath_wprobe.c"
  25  static int beacon_cal = 1;
  26 @@ -432,7 +430,6 @@ static struct notifier_block ath_event_b
  27
  28  #if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,52))
  29  MODULE_PARM(beacon_cal, "i");
  30 -MODULE_PARM(maxvaps, "i");
  31  MODULE_PARM(xchanmode, "i");
  32  MODULE_PARM(rfkill, "i");
  33  #ifdef ATH_CAP_TPC
  34 @@ -444,7 +441,6 @@ MODULE_PARM(ratectl, "s");
  35  #else
  36  #include <linux/moduleparam.h>
  37  module_param(beacon_cal, int, 0600);
  38 -module_param(maxvaps, int, 0600);
  39  module_param(xchanmode, int, 0600);
  40  module_param(rfkill, int, 0600);
  41  #ifdef ATH_CAP_TPC
  42 @@ -454,7 +450,6 @@ module_param(bstuck_thresh, int, 0600);
  43  module_param(autocreate, charp, 0600);
  44  module_param(ratectl, charp, 0600);
  45  #endif
  46 -MODULE_PARM_DESC(maxvaps, "Maximum VAPs");
  47  MODULE_PARM_DESC(xchanmode, "Enable/disable extended channel mode");
  48  MODULE_PARM_DESC(rfkill, "Enable/disable RFKILL capability");
  49  #ifdef ATH_CAP_TPC
  50 @@ -512,7 +507,7 @@ MODULE_PARM_DESC(ieee80211_debug, "Load-
  51   * and use the higher bits as the index of the VAP.
  52   */
  53  #define ATH_SET_VAP_BSSID_MASK(bssid_mask)                             \
  54 -       ((bssid_mask)[0] &= ~(((ath_maxvaps-1) << 2) | 0x02))
  55 +       ((bssid_mask)[0] &= ~(((ATH_MAXVAPS_BCN-1) << 2) | 0x02))
  56  #define ATH_GET_VAP_ID(bssid)                   ((bssid)[0] >> 2)
  57  #define ATH_SET_VAP_BSSID(bssid, id)                                   \
  58                 do {                                                    \
  59 @@ -604,8 +599,8 @@ ath_attach(u_int16_t devid, struct net_d
  60
  61         /* Allocate space for dynamically determined maximum VAP count */
  62         sc->sc_bslot =
  63 -               kmalloc(ath_maxvaps * sizeof(struct ieee80211vap*), GFP_KERNEL);
  64 -       memset(sc->sc_bslot, 0, ath_maxvaps * sizeof(struct ieee80211vap*));
  65 +               kmalloc(ATH_MAXVAPS_BCN * sizeof(struct ieee80211vap*), GFP_KERNEL);
  66 +       memset(sc->sc_bslot, 0, ATH_MAXVAPS_BCN * sizeof(struct ieee80211vap*));
  67
  68         /*
  69          * Cache line size is used to size and align various
  70 @@ -694,13 +689,6 @@ ath_attach(u_int16_t devid, struct net_d
  71         for (i = 0; i < sc->sc_keymax; i++)
  72                 ath_hal_keyreset(ah, i);
  73
  74 -       if (maxvaps != -1) {
  75 -               ath_maxvaps = maxvaps;
  76 -               if (ath_maxvaps < ATH_MAXVAPS_MIN)
  77 -                       ath_maxvaps = ATH_MAXVAPS_MIN;
  78 -               else if (ath_maxvaps > ATH_MAXVAPS_MAX)
  79 -                       ath_maxvaps = ATH_MAXVAPS_MAX;
  80 -       }
  81         if (xchanmode != -1)
  82                 ath_xchanmode = xchanmode;
  83         error = ath_getchannels(dev);
  84 @@ -1349,12 +1337,6 @@ ath_vap_create(struct ieee80211com *ic,
  85                 return NULL;
  86         }
  87
  88 -       if (sc->sc_nvaps >= ath_maxvaps) {
  89 -               EPRINTF(sc, "Too many virtual APs (%d already exist).\n",
  90 -                               sc->sc_nvaps);
  91 -               return NULL;
  92 -       }
  93 -
  94         dev = alloc_etherdev(sizeof(struct ath_vap) + sc->sc_rc->arc_vap_space);
  95         if (dev == NULL) {
  96                 /* XXX msg */
  97 @@ -1424,7 +1406,7 @@ ath_vap_create(struct ieee80211com *ic,
  98                 TAILQ_FOREACH(v, &ic->ic_vaps, iv_next)
  99                         id_mask |= (1 << ATH_GET_VAP_ID(v->iv_myaddr));
 100
 101 -               for (id = 0; id < ath_maxvaps; id++) {
 102 +               for (id = 0; id < ATH_MAXVAPS_BCN; id++) {
 103                         /* get the first available slot */
 104                         if ((id_mask & (1 << id)) == 0) {
 105                                 ATH_SET_VAP_BSSID(vap->iv_myaddr, id);
 106 @@ -1451,11 +1433,11 @@ ath_vap_create(struct ieee80211com *ic,
 107                 /* Assign the VAP to a beacon xmit slot.  As
 108                  * above, this cannot fail to find one. */
 109                 avp->av_bslot = 0;
 110 -               for (slot = 0; slot < ath_maxvaps; slot++)
 111 +               for (slot = 0; slot < ATH_MAXVAPS_BCN; slot++)
 112                         if (sc->sc_bslot[slot] == NULL) {
 113                                 /* XXX: Hack, space out slots to better
 114                                  * deal with misses. */
 115 -                               if (slot + 1 < ath_maxvaps &&
 116 +                               if (slot + 1 < ATH_MAXVAPS_BCN &&
 117                                     sc->sc_bslot[slot+1] == NULL) {
 118                                         avp->av_bslot = slot + 1;
 119                                         break;
 120 @@ -1463,8 +1445,11 @@ ath_vap_create(struct ieee80211com *ic,
 121                                 avp->av_bslot = slot;
 122                                 /* NB: keep looking for a double slot */
 123                         }
 124 -               KASSERT(sc->sc_bslot[avp->av_bslot] == NULL,
 125 -                       ("beacon slot %u not empty?", avp->av_bslot));
 126 +               if (sc->sc_bslot[avp->av_bslot]) {
 127 +                       free_netdev(dev);
 128 +                       return NULL;
 129 +               }
 130 +
 131                 sc->sc_bslot[avp->av_bslot] = vap;
 132                 sc->sc_nbcnvaps++;
 133
 134 @@ -1475,15 +1460,7 @@ ath_vap_create(struct ieee80211com *ic,
 135                          * of staggered beacons.
 136                          */
 137                         /* XXX check for beacon interval too small */
 138 -                       if (ath_maxvaps > 4) {
 139 -                               DPRINTF(sc, ATH_DEBUG_BEACON,
 140 -                                               "Staggered beacons are not "
 141 -                                               "possible with maxvaps set "
 142 -                                               "to %d.\n", ath_maxvaps);
 143 -                               sc->sc_stagbeacons = 0;
 144 -                       } else {
 145 -                               sc->sc_stagbeacons = 1;
 146 -                       }
 147 +                       sc->sc_stagbeacons = 1;
 148                 }
 149                 DPRINTF(sc, ATH_DEBUG_BEACON, "sc->sc_stagbeacons %sabled\n",
 150                                 (sc->sc_stagbeacons ? "en" : "dis"));
 151 @@ -1553,7 +1530,7 @@ ath_vap_create(struct ieee80211com *ic,
 152                 if (ath_startrecv(sc) != 0)     /* restart recv */
 153                         EPRINTF(sc, "Unable to start receive logic.\n");
 154                 if (sc->sc_beacons)
 155 -                       ath_beacon_config(sc, NULL);    /* restart beacons */
 156 +                       ath_beacon_config(sc, NULL, 0); /* restart beacons */
 157                 ath_hal_intrset(ah, sc->sc_imask);
 158         }
 159
 160 @@ -1681,7 +1658,7 @@ ath_vap_delete(struct ieee80211vap *vap)
 161                 if (ath_startrecv(sc) != 0)             /* restart recv. */
 162                         EPRINTF(sc, "Unable to start receive logic.\n");
 163                 if (sc->sc_beacons)
 164 -                       ath_beacon_config(sc, NULL);    /* restart beacons */
 165 +                       ath_beacon_config(sc, NULL, 0); /* restart beacons */
 166                 ath_hal_intrset(ah, sc->sc_imask);
 167         }
 168  }
 169 @@ -3066,7 +3043,7 @@ ath_reset(struct net_device *dev)
 170          */
 171         ath_chan_change(sc, c);
 172         if (sc->sc_beacons)
 173 -               ath_beacon_config(sc, NULL);    /* restart beacons */
 174 +               ath_beacon_config(sc, NULL, 1); /* restart beacons */
 175         ath_hal_intrset(ah, sc->sc_imask);
 176         ath_set_ack_bitrate(sc, sc->sc_ackrate);
 177         netif_wake_queue(dev);          /* restart xmit */
 178 @@ -4763,7 +4740,7 @@ ath_check_beacon_done(struct ath_softc *
 179         /*
 180          * check if the last beacon went out with the mode change flag set.
 181          */
 182 -       for (slot = 0; slot < ath_maxvaps; slot++) {
 183 +       for (slot = 0; slot < ATH_MAXVAPS_BCN; slot++) {
 184                 if (sc->sc_bslot[slot]) {
 185                         vap = sc->sc_bslot[slot];
 186                         break;
 187 @@ -4968,7 +4945,7 @@ ath_beacon_alloc_internal(struct ath_sof
 188                  * has a timestamp in one beacon interval while the
 189                  * others get a timestamp aligned to the next interval.
 190                  */
 191 -               tuadjust = (ni->ni_intval * (ath_maxvaps - avp->av_bslot)) / ath_maxvaps;
 192 +               tuadjust = (ni->ni_intval * (ATH_MAXVAPS_BCN - avp->av_bslot)) / ATH_MAXVAPS_BCN;
 193                 tsfadjust = cpu_to_le64(tuadjust << 10);        /* TU->TSF */
 194
 195                 DPRINTF(sc, ATH_DEBUG_BEACON,
 196 @@ -5361,8 +5338,8 @@ ath_beacon_send(struct ath_softc *sc, in
 197                 u_int32_t tsftu;
 198
 199                 tsftu = hw_tsf >> 10; /* NB: 64 -> 32: See note far above. */
 200 -               slot = ((tsftu % ic->ic_lintval) * ath_maxvaps) / ic->ic_lintval;
 201 -               vap = sc->sc_bslot[(slot + 1) % ath_maxvaps];
 202 +               slot = ((tsftu % ic->ic_lintval) * ATH_MAXVAPS_BCN) / ic->ic_lintval;
 203 +               vap = sc->sc_bslot[(slot + 1) % ATH_MAXVAPS_BCN];
 204                 DPRINTF(sc, ATH_DEBUG_BEACON_PROC,
 205                         "Slot %d [tsf %llu tsftu %llu intval %u] vap %p\n",
 206                         slot, (unsigned long long)hw_tsf,
 207 @@ -5377,7 +5354,7 @@ ath_beacon_send(struct ath_softc *sc, in
 208                 u_int32_t *bflink = NULL;
 209
 210                 /* XXX: rotate/randomize order? */
 211 -               for (slot = 0; slot < ath_maxvaps; slot++) {
 212 +               for (slot = 0; slot < ATH_MAXVAPS_BCN; slot++) {
 213                         if ((vap = sc->sc_bslot[slot]) != NULL) {
 214                                 if ((bf = ath_beacon_generate(
 215                                                 sc, vap,
 216 @@ -5418,7 +5395,7 @@ ath_beacon_send(struct ath_softc *sc, in
 217          *     again.  If we miss a beacon for that slot then we'll be
 218          *     slow to transition but we'll be sure at least one beacon
 219          *     interval has passed.  When bursting slot is always left
 220 -        *     set to ath_maxvaps so this check is a no-op.
 221 +        *     set to ATH_MAXVAPS_BCN so this check is a no-op.
 222          */
 223         /* XXX locking */
 224         if (sc->sc_updateslot == UPDATE) {
 225 @@ -5526,7 +5503,7 @@ ath_beacon_free(struct ath_softc *sc)
 226   * (2^(32 + 10 - 1) - 1)us is a really long time.
 227   */
 228  static void
 229 -ath_beacon_config(struct ath_softc *sc, struct ieee80211vap *vap)
 230 +ath_beacon_config(struct ath_softc *sc, struct ieee80211vap *vap, int reset)
 231  {
 232         struct ieee80211com *ic = &sc->sc_ic;
 233         struct ath_hal *ah = sc->sc_ah;
 234 @@ -5553,7 +5530,7 @@ ath_beacon_config(struct ath_softc *sc,
 235         /* We should reset hw TSF only once, so we increment
 236          * ni_tstamp.tsf to avoid resetting the hw TSF multiple
 237          * times */
 238 -       if (tsf == 0) {
 239 +       if (tsf == 0 || reset) {
 240                 reset_tsf = 1;
 241                 ni->ni_tstamp.tsf = cpu_to_le64(1);
 242         }
 243 @@ -5567,7 +5544,7 @@ ath_beacon_config(struct ath_softc *sc,
 244                 /* NB: the beacon interval is kept internally in TUs */
 245                 intval = ic->ic_lintval & HAL_BEACON_PERIOD;
 246                 if (sc->sc_stagbeacons)
 247 -                       intval /= ath_maxvaps;  /* for staggered beacons */
 248 +                       intval /= ATH_MAXVAPS_BCN;      /* for staggered beacons */
 249                 if ((sc->sc_nostabeacons) &&
 250                     (vap->iv_opmode == IEEE80211_M_HOSTAP))
 251                         reset_tsf = 1;
 252 @@ -5583,31 +5560,24 @@ ath_beacon_config(struct ath_softc *sc,
 253                  * time */
 254                 nexttbtt = intval;
 255         } else if (intval) {    /* NB: can be 0 for monitor mode */
 256 -               if (tsf == 1) {
 257 -                       /* We have not received any beacons or probe
 258 -                        * responses. Since a beacon should be sent
 259 -                        * every 'intval' ms, we compute the next
 260 -                        * beacon timestamp using the hardware TSF. We
 261 -                        * ensure that it is at least FUDGE TUs ahead
 262 -                        * of the current TSF. Otherwise, we use the
 263 -                        * next beacon timestamp again */
 264 -                       nexttbtt = roundup(hw_tsftu + FUDGE, intval);
 265 -               }
 266 -               else if (ic->ic_opmode == IEEE80211_M_IBSS) {
 267 -                       if (tsf > hw_tsf) {
 268 -                               /* We received a beacon, but the HW TSF has
 269 -                                * not been updated (otherwise hw_tsf > tsf)
 270 -                                * We cannot use the hardware TSF, so we
 271 -                                * wait to synchronize beacons again. */
 272 -                               sc->sc_syncbeacon = 1;
 273 -                               goto ath_beacon_config_debug;
 274 -                       } else {
 275 -                               /* Normal case: we received a beacon to which
 276 -                                * we have synchronized. Make sure that nexttbtt
 277 -                                * is at least FUDGE TU ahead of hw_tsf */
 278 -                               nexttbtt = tsftu + roundup(hw_tsftu + FUDGE -
 279 -                                               tsftu, intval);
 280 -                       }
 281 +               if ((tsf > hw_tsf) && (ic->ic_opmode == IEEE80211_M_IBSS)) {
 282 +                       /* We received a beacon, but the HW TSF has
 283 +                        * not been updated (otherwise hw_tsf > tsf)
 284 +                        * We cannot use the hardware TSF, so we
 285 +                        * wait to synchronize beacons again. */
 286 +                       sc->sc_syncbeacon = 1;
 287 +                       goto ath_beacon_config_debug;
 288 +               } else if ((tsftu + FUDGE) > hw_tsftu) {
 289 +                       if (tsftu > hw_tsftu + 2 * intval)
 290 +                               nexttbtt = roundup(hw_tsftu + FUDGE, intval);
 291 +                       else
 292 +                               nexttbtt = tsftu;
 293 +               } else {
 294 +                       /* Normal case: we received a beacon to which
 295 +                        * we have synchronized. Make sure that nexttbtt
 296 +                        * is at least FUDGE TU ahead of hw_tsf */
 297 +                       nexttbtt = tsftu + roundup(hw_tsftu + FUDGE -
 298 +                                       tsftu, intval);
 299                 }
 300         }
 301
 302 @@ -5730,9 +5700,6 @@ ath_beacon_config(struct ath_softc *sc,
 303                 ath_beacon_dturbo_config(vap, intval &
 304                                 ~(HAL_BEACON_RESET_TSF | HAL_BEACON_ENA));
 305  #endif
 306 -               if ((nexttbtt & HAL_BEACON_PERIOD) - (ath_hal_gettsf32(ah) >> 10)
 307 -                               <= ath_hal_sw_beacon_response_time)
 308 -                       nexttbtt += intval;
 309                 sc->sc_nexttbtt = nexttbtt;
 310
 311                 /* stop beacons before reconfiguring the timers to avoid race
 312 @@ -5889,7 +5856,7 @@ ath_desc_alloc(struct ath_softc *sc)
 313
 314         /* XXX allocate beacon state together with VAP */
 315         error = ath_descdma_setup(sc, &sc->sc_bdma, &sc->sc_bbuf,
 316 -                       "beacon", ath_maxvaps, 1);
 317 +                       "beacon", ATH_MAXVAPS_BCN, 1);
 318         if (error != 0) {
 319                 ath_descdma_cleanup(sc, &sc->sc_txdma, &sc->sc_txbuf,
 320                         BUS_DMA_TODEVICE);
 321 @@ -6680,7 +6647,7 @@ ath_recv_mgmt(struct ieee80211vap * vap,
 322                         /* Resync beacon timers using the tsf of the
 323                          * beacon frame we just received. */
 324                         vap->iv_flags_ext &= ~IEEE80211_FEXT_APPIE_UPDATE;
 325 -                       ath_beacon_config(sc, vap);
 326 +                       ath_beacon_config(sc, vap, 0);
 327                         DPRINTF(sc, ATH_DEBUG_BEACON,
 328                                 "Updated beacon timers\n");
 329                 }
 330 @@ -9359,7 +9326,7 @@ ath_chan_set(struct ath_softc *sc, struc
 331                  * HW seems to turn off beacons during turbo mode switch.
 332                  */
 333                 if (sc->sc_beacons && !sc->sc_dfs_cac)
 334 -                       ath_beacon_config(sc, NULL);
 335 +                       ath_beacon_config(sc, NULL, 0);
 336                 /*
 337                  * Re-enable interrupts.
 338                  */
 339 @@ -9813,7 +9780,7 @@ ath_newstate(struct ieee80211vap *vap, e
 340                                         ATH_DEBUG_BEACON_PROC,
 341                                 "Beacons reconfigured by %p[%s]!\n",
 342                                 vap, vap->iv_nickname);
 343 -                       ath_beacon_config(sc, vap);
 344 +                       ath_beacon_config(sc, vap, 1);
 345                         sc->sc_beacons = 1;
 346                 }
 347         } else {
 348 @@ -9948,9 +9915,6 @@ ath_dfs_cac_completed(unsigned long data
 349                 }
 350                 netif_wake_queue(dev);
 351                 ath_reset(dev);
 352 -               if (sc->sc_beacons) {
 353 -                       ath_beacon_config(sc, NULL);
 354 -               }
 355                 dev->watchdog_timeo = 5 * HZ; /* restore normal timeout */
 356         } else {
 357                 do_gettimeofday(&tv);
 358 @@ -11473,9 +11437,6 @@ ATH_SYSCTL_DECL(ath_sysctl_halparam, ctl
 359                 case ATH_OUTDOOR:
 360                         val = ic->ic_country_outdoor;
 361                         break;
 362 -               case ATH_MAXVAPS:
 363 -                       val = ath_maxvaps;
 364 -                       break;
 365                 case ATH_REGDOMAIN:
 366                         ath_hal_getregdomain(ah, &val);
 367                         break;
 368 @@ -11606,12 +11567,6 @@ static const ctl_table ath_sysctl_templa
 369           .extra2       = (void *)ATH_OUTDOOR,
 370         },
 371         { .ctl_name     = CTL_AUTO,
 372 -         .procname     = "maxvaps",
 373 -         .mode         = 0444,
 374 -         .proc_handler = ath_sysctl_halparam,
 375 -         .extra2       = (void *)ATH_MAXVAPS,
 376 -       },
 377 -       { .ctl_name     = CTL_AUTO,
 378           .procname     = "regdomain",
 379           .mode         = 0644,
 380           .proc_handler = ath_sysctl_halparam,
 381 @@ -11928,13 +11883,6 @@ static ctl_table ath_static_sysctls[] =
 382         },
 383  #endif
 384         { .ctl_name     = CTL_AUTO,
 385 -         .procname     = "maxvaps",
 386 -         .mode         = 0444,
 387 -         .data         = &ath_maxvaps,
 388 -         .maxlen       = sizeof(ath_maxvaps),
 389 -         .proc_handler = proc_dointvec
 390 -       },
 391 -       { .ctl_name     = CTL_AUTO,
 392           .procname     = "xchanmode",
 393           .mode         = 0444,
 394           .data         = &ath_xchanmode,
 395 --- a/ath/if_athvar.h
 396 +++ b/ath/if_athvar.h
 397 @@ -211,9 +211,7 @@ static inline struct net_device *_alloc_
 398  #define        ATH_RXBUF       40              /* number of RX buffers */
 399  #define        ATH_TXBUF       200             /* number of TX buffers */
 400
 401 -#define ATH_MAXVAPS_MIN        2       /* minimum number of beacon buffers */
 402 -#define ATH_MAXVAPS_MAX        64      /* maximum number of beacon buffers */
 403 -#define ATH_MAXVAPS_DEFAULT    4       /* default number of beacon buffers */
 404 +#define ATH_MAXVAPS_BCN                4       /* maximum number of beacon buffers */
 405
 406  /* free buffer threshold to restart net dev */
 407  #define        ATH_TXBUF_FREE_THRESHOLD  (ATH_TXBUF / 20)