package/madwifi/patches/416-wprobe.patch

   1 --- /dev/null
   2 +++ b/ath/ath_wprobe.c
   3 @@ -0,0 +1,392 @@
   4 +#include <net80211/ieee80211_node.h>
   5 +#include <linux/wprobe.h>
   6 +
   7 +atomic_t cleanup_tasks = ATOMIC_INIT(0);
   8 +
   9 +enum wp_node_val {
  10 +       WP_NODE_RSSI,
  11 +       WP_NODE_SIGNAL,
  12 +       WP_NODE_RX_RATE,
  13 +       WP_NODE_TX_RATE,
  14 +       WP_NODE_RETRANSMIT_200,
  15 +       WP_NODE_RETRANSMIT_400,
  16 +       WP_NODE_RETRANSMIT_800,
  17 +       WP_NODE_RETRANSMIT_1600,
  18 +};
  19 +
  20 +enum wp_global_val {
  21 +       WP_GLOBAL_NOISE,
  22 +       WP_GLOBAL_PHY_BUSY,
  23 +       WP_GLOBAL_PHY_RX,
  24 +       WP_GLOBAL_PHY_TX,
  25 +       WP_GLOBAL_FRAMES,
  26 +       WP_GLOBAL_PROBEREQ,
  27 +};
  28 +
  29 +static struct wprobe_item ath_wprobe_globals[] = {
  30 +       [WP_GLOBAL_NOISE] = {
  31 +               .name = "noise",
  32 +               .type = WPROBE_VAL_S16,
  33 +               .flags = WPROBE_F_KEEPSTAT
  34 +       },
  35 +       [WP_GLOBAL_PHY_BUSY] = {
  36 +               .name = "phy_busy",
  37 +               .type = WPROBE_VAL_U8,
  38 +               .flags = WPROBE_F_KEEPSTAT
  39 +       },
  40 +       [WP_GLOBAL_PHY_RX] = {
  41 +               .name = "phy_rx",
  42 +               .type = WPROBE_VAL_U8,
  43 +               .flags = WPROBE_F_KEEPSTAT
  44 +       },
  45 +       [WP_GLOBAL_PHY_TX] = {
  46 +               .name = "phy_tx",
  47 +               .type = WPROBE_VAL_U8,
  48 +               .flags = WPROBE_F_KEEPSTAT
  49 +       },
  50 +       [WP_GLOBAL_FRAMES] = {
  51 +               .name = "frames",
  52 +               .type = WPROBE_VAL_U32,
  53 +       },
  54 +       [WP_GLOBAL_PROBEREQ] = {
  55 +               .name = "probereq",
  56 +               .type = WPROBE_VAL_U32,
  57 +       },
  58 +};
  59 +
  60 +static struct wprobe_item ath_wprobe_link[] = {
  61 +       [WP_NODE_RSSI] = {
  62 +               .name = "rssi",
  63 +               .type = WPROBE_VAL_U8,
  64 +               .flags = WPROBE_F_KEEPSTAT
  65 +       },
  66 +       [WP_NODE_SIGNAL] = {
  67 +               .name = "signal",
  68 +               .type = WPROBE_VAL_S16,
  69 +               .flags = WPROBE_F_KEEPSTAT
  70 +       },
  71 +       [WP_NODE_RX_RATE] = {
  72 +               .name = "rx_rate",
  73 +               .type = WPROBE_VAL_U16,
  74 +               .flags = WPROBE_F_KEEPSTAT
  75 +       },
  76 +       [WP_NODE_TX_RATE] = {
  77 +               .name = "tx_rate",
  78 +               .type = WPROBE_VAL_U16,
  79 +               .flags = WPROBE_F_KEEPSTAT
  80 +       },
  81 +       [WP_NODE_RETRANSMIT_200] = {
  82 +               .name = "retransmit_200",
  83 +               .type = WPROBE_VAL_U8,
  84 +               .flags = WPROBE_F_KEEPSTAT
  85 +       },
  86 +       [WP_NODE_RETRANSMIT_400] = {
  87 +               .name = "retransmit_400",
  88 +               .type = WPROBE_VAL_U8,
  89 +               .flags = WPROBE_F_KEEPSTAT
  90 +       },
  91 +       [WP_NODE_RETRANSMIT_800] = {
  92 +               .name = "retransmit_800",
  93 +               .type = WPROBE_VAL_U8,
  94 +               .flags = WPROBE_F_KEEPSTAT
  95 +       },
  96 +       [WP_NODE_RETRANSMIT_1600] = {
  97 +               .name = "retransmit_1600",
  98 +               .type = WPROBE_VAL_U8,
  99 +               .flags = WPROBE_F_KEEPSTAT
 100 +       },
 101 +};
 102 +
 103 +#define AR5K_MIBC       0x0040
 104 +#define AR5K_MIBC_FREEZE       (1 << 1)
 105 +#define AR5K_TXFC       0x80ec
 106 +#define AR5K_RXFC       0x80f0
 107 +#define AR5K_RXCLEAR    0x80f4
 108 +#define AR5K_CYCLES     0x80f8
 109 +
 110 +#define READ_CLR(_ah, _reg) \
 111 +       ({ u32 __val = OS_REG_READ(_ah, _reg); OS_REG_WRITE(_ah, _reg, 0); __val; })
 112 +
 113 +static bool
 114 +wprobe_disabled(void)
 115 +{
 116 +       return (!wprobe_add_iface || IS_ERR(wprobe_add_iface));
 117 +}
 118 +
 119 +static int
 120 +ath_wprobe_sync(struct wprobe_iface *dev, struct wprobe_link *l, struct wprobe_value *val, bool measure)
 121 +{
 122 +       struct ath_vap *avp = container_of(dev, struct ath_vap, av_wpif);
 123 +       struct ieee80211vap *vap = &avp->av_vap;
 124 +       struct ieee80211com *ic = vap->iv_ic;
 125 +       struct ath_softc *sc = ic->ic_dev->priv;
 126 +       struct ath_hal *ah = sc->sc_ah;
 127 +       u32 cc, busy, rx, tx;
 128 +       s16 noise;
 129 +
 130 +       if (l)
 131 +               goto out;
 132 +
 133 +       OS_REG_WRITE(ah, AR5K_MIBC, AR5K_MIBC_FREEZE);
 134 +       cc = READ_CLR(ah, AR5K_CYCLES);
 135 +       busy = READ_CLR(ah, AR5K_RXCLEAR);
 136 +       rx = READ_CLR(ah, AR5K_RXFC);
 137 +       tx = READ_CLR(ah, AR5K_TXFC);
 138 +       OS_REG_WRITE(ah, AR5K_MIBC, 0);
 139 +       noise = ath_hal_get_channel_noise(sc->sc_ah, &(sc->sc_curchan));
 140 +       ic->ic_channoise = noise;
 141 +
 142 +       WPROBE_FILL_BEGIN(val, ath_wprobe_globals);
 143 +       if (cc & 0xf0000000) {
 144 +               /* scale down if the counters are near max */
 145 +               cc >>= 8;
 146 +               busy >>= 8;
 147 +               rx >>= 8;
 148 +               tx >>= 8;
 149 +       }
 150 +       if (ah->ah_macType < 5212)
 151 +               goto phy_skip;
 152 +       if (!cc)
 153 +               goto phy_skip;
 154 +       if (busy > cc)
 155 +               goto phy_skip;
 156 +       if (rx > cc)
 157 +               goto phy_skip;
 158 +       if (tx > cc)
 159 +               goto phy_skip;
 160 +       busy = (busy * 100) / cc;
 161 +       rx = (rx * 100) / cc;
 162 +       tx = (tx * 100) / cc;
 163 +       WPROBE_SET(WP_GLOBAL_PHY_BUSY, U8, busy);
 164 +       WPROBE_SET(WP_GLOBAL_PHY_RX, U8, rx);
 165 +       WPROBE_SET(WP_GLOBAL_PHY_TX, U8, tx);
 166 +       WPROBE_SET(WP_GLOBAL_FRAMES, U32, avp->av_rxframes);
 167 +       WPROBE_SET(WP_GLOBAL_PROBEREQ, U32, avp->av_rxprobereq);
 168 +
 169 +phy_skip:
 170 +       WPROBE_SET(WP_GLOBAL_NOISE, S16, noise);
 171 +       WPROBE_FILL_END();
 172 +
 173 +out:
 174 +       return 0;
 175 +}
 176 +
 177 +#undef AR5K_TXFC
 178 +#undef AR5K_RXFC
 179 +#undef AR5K_RXCLEAR
 180 +#undef AR5K_CYCLES
 181 +#undef AR5K_MIBC
 182 +#undef AR5K_MIBC_FREEZE
 183 +#undef READ_CLR
 184 +
 185 +static const struct wprobe_iface ath_wprobe_dev = {
 186 +       .link_items = ath_wprobe_link,
 187 +       .n_link_items = ARRAY_SIZE(ath_wprobe_link),
 188 +       .global_items = ath_wprobe_globals,
 189 +       .n_global_items = ARRAY_SIZE(ath_wprobe_globals),
 190 +       .sync_data = ath_wprobe_sync,
 191 +};
 192 +
 193 +static int
 194 +ath_lookup_rateval(struct ieee80211_node *ni, int rate)
 195 +{
 196 +       struct ieee80211vap *vap = ni->ni_vap;
 197 +       struct ieee80211com *ic = vap->iv_ic;
 198 +       struct ath_softc *sc = ic->ic_dev->priv;
 199 +       const HAL_RATE_TABLE *rt = sc->sc_currates;
 200 +
 201 +       if ((!rt) || (rate < 0) || (rate >= ARRAY_SIZE(sc->sc_hwmap)))
 202 +               return -1;
 203 +
 204 +       rate = sc->sc_hwmap[rate].ieeerate;
 205 +       rate = sc->sc_rixmap[rate & IEEE80211_RATE_VAL];
 206 +       if ((rate < 0) || (rate >= rt->rateCount))
 207 +               return -1;
 208 +
 209 +       return rt->info[rate].rateKbps / 10;
 210 +}
 211 +
 212 +static void
 213 +ath_node_sample_rx(struct ieee80211_node *ni, struct ath_rx_status *rs)
 214 +{
 215 +       struct ath_node *an = ATH_NODE(ni);
 216 +       struct ieee80211vap *vap = ni->ni_vap;
 217 +       struct ieee80211com *ic = vap->iv_ic;
 218 +       struct wprobe_link *l = &an->an_wplink;
 219 +       struct wprobe_value *v = l->val;
 220 +       unsigned long flags;
 221 +       int rate;
 222 +
 223 +       if (wprobe_disabled() || !an->an_wplink_active || !l->val)
 224 +               return;
 225 +
 226 +       rate = ath_lookup_rateval(ni, rs->rs_rate);
 227 +
 228 +       spin_lock_irqsave(&l->iface->lock, flags);
 229 +       WPROBE_FILL_BEGIN(v, ath_wprobe_link);
 230 +       WPROBE_SET(WP_NODE_RSSI, U8, rs->rs_rssi);
 231 +       WPROBE_SET(WP_NODE_SIGNAL, S16, ic->ic_channoise + rs->rs_rssi);
 232 +       if ((rate > 0) && (rate <= 600000))
 233 +               WPROBE_SET(WP_NODE_RX_RATE, U16, rate);
 234 +       WPROBE_FILL_END();
 235 +       wprobe_update_stats(l->iface, l);
 236 +       spin_unlock_irqrestore(&l->iface->lock, flags);
 237 +}
 238 +
 239 +static void
 240 +ath_node_sample_tx(struct ieee80211_node *ni, struct ath_tx_status *ts, int len)
 241 +{
 242 +       struct ath_node *an = ATH_NODE(ni);
 243 +       struct ieee80211vap *vap = ni->ni_vap;
 244 +       struct ieee80211com *ic = vap->iv_ic;
 245 +       struct wprobe_link *l = &an->an_wplink;
 246 +       struct wprobe_value *v = l->val;
 247 +       unsigned long flags;
 248 +       int rate, rexmit_counter;
 249 +
 250 +       if (wprobe_disabled() || !an->an_wplink_active || !l->val)
 251 +               return;
 252 +
 253 +       rate = ath_lookup_rateval(ni, ts->ts_rate);
 254 +
 255 +       spin_lock_irqsave(&l->iface->lock, flags);
 256 +       WPROBE_FILL_BEGIN(v, ath_wprobe_link);
 257 +       WPROBE_SET(WP_NODE_RSSI, U8, ts->ts_rssi);
 258 +       WPROBE_SET(WP_NODE_SIGNAL, S16, ic->ic_channoise + ts->ts_rssi);
 259 +
 260 +       if (len <= 200)
 261 +               rexmit_counter = WP_NODE_RETRANSMIT_200;
 262 +       else if (len <= 400)
 263 +               rexmit_counter = WP_NODE_RETRANSMIT_400;
 264 +       else if (len <= 800)
 265 +               rexmit_counter = WP_NODE_RETRANSMIT_800;
 266 +       else
 267 +               rexmit_counter = WP_NODE_RETRANSMIT_1600;
 268 +       WPROBE_SET(rexmit_counter, U8, ts->ts_longretry);
 269 +
 270 +       if ((rate > 0) && (rate <= 600000))
 271 +               WPROBE_SET(WP_NODE_TX_RATE, U16, rate);
 272 +       WPROBE_FILL_END();
 273 +       wprobe_update_stats(l->iface, l);
 274 +       spin_unlock_irqrestore(&l->iface->lock, flags);
 275 +}
 276 +
 277 +static void
 278 +ath_wprobe_report_rx(struct ieee80211vap *vap, struct sk_buff *skb)
 279 +{
 280 +       struct ieee80211_frame *wh = (struct ieee80211_frame *)skb->data;
 281 +       struct ath_vap *avp;
 282 +
 283 +       if (wprobe_disabled())
 284 +               return;
 285 +
 286 +       avp = ATH_VAP(vap);
 287 +       avp->av_rxframes++;
 288 +       if (wh->i_fc[0] == (IEEE80211_FC0_TYPE_MGT | IEEE80211_FC0_SUBTYPE_PROBE_REQ))
 289 +               avp->av_rxprobereq++;
 290 +}
 291 +
 292 +static void
 293 +ath_wprobe_node_join(struct ieee80211vap *vap, struct ieee80211_node *ni)
 294 +{
 295 +       struct wprobe_iface *dev;
 296 +       struct wprobe_link *l;
 297 +       struct ath_vap *avp;
 298 +       struct ath_node *an = ATH_NODE(ni);
 299 +
 300 +       if (wprobe_disabled() || an->an_wplink_active)
 301 +               return;
 302 +
 303 +       avp = ATH_VAP(vap);
 304 +       dev = &avp->av_wpif;
 305 +       l = &an->an_wplink;
 306 +
 307 +       ieee80211_ref_node(ni);
 308 +       wprobe_add_link(dev, l, ni->ni_macaddr);
 309 +       an->an_wplink_active = 1;
 310 +}
 311 +
 312 +static void
 313 +ath_wprobe_do_node_leave(struct work_struct *work)
 314 +{
 315 +       struct ath_node *an = container_of(work, struct ath_node, an_destroy);
 316 +       struct ieee80211_node *ni = &an->an_node;
 317 +       struct ieee80211vap *vap = ni->ni_vap;
 318 +       struct wprobe_iface *dev;
 319 +       struct wprobe_link *l;
 320 +       struct ath_vap *avp;
 321 +
 322 +       avp = ATH_VAP(vap);
 323 +       dev = &avp->av_wpif;
 324 +       l = &an->an_wplink;
 325 +
 326 +       wprobe_remove_link(dev, l);
 327 +       ieee80211_unref_node(&ni);
 328 +       atomic_dec(&cleanup_tasks);
 329 +}
 330 +
 331 +static void
 332 +ath_wprobe_node_leave(struct ieee80211vap *vap, struct ieee80211_node *ni)
 333 +{
 334 +       struct ath_node *an = ATH_NODE(ni);
 335 +
 336 +       if (wprobe_disabled() || !an->an_wplink_active)
 337 +               return;
 338 +
 339 +       atomic_inc(&cleanup_tasks);
 340 +       an->an_wplink_active = 0;
 341 +       IEEE80211_INIT_WORK(&an->an_destroy, ath_wprobe_do_node_leave);
 342 +       schedule_work(&an->an_destroy);
 343 +}
 344 +
 345 +static void
 346 +ath_init_wprobe_dev(struct ath_vap *avp)
 347 +{
 348 +       struct ieee80211vap *vap = &avp->av_vap;
 349 +       struct wprobe_iface *dev = &avp->av_wpif;
 350 +
 351 +       if (wprobe_disabled() || (vap->iv_opmode == IEEE80211_M_WDS))
 352 +               return;
 353 +
 354 +       memcpy(dev, &ath_wprobe_dev, sizeof(struct wprobe_iface));
 355 +       dev->addr = vap->iv_myaddr;
 356 +       dev->name = vap->iv_dev->name;
 357 +       wprobe_add_iface(dev);
 358 +}
 359 +
 360 +static void
 361 +ath_remove_wprobe_dev(struct ath_vap *avp)
 362 +{
 363 +       struct ieee80211vap *vap = &avp->av_vap;
 364 +       struct ieee80211com *ic = vap->iv_ic;
 365 +       struct ieee80211_node *ni;
 366 +       struct wprobe_iface *dev = &avp->av_wpif;
 367 +       struct wprobe_link *l;
 368 +       struct ath_node *an;
 369 +       unsigned long flags;
 370 +
 371 +       if (wprobe_disabled() || (vap->iv_opmode == IEEE80211_M_WDS))
 372 +               return;
 373 +
 374 +restart:
 375 +       rcu_read_lock();
 376 +       list_for_each_entry_rcu(l, &dev->links, list) {
 377 +               an = container_of(l, struct ath_node, an_wplink);
 378 +
 379 +               if (!an->an_wplink_active)
 380 +                       continue;
 381 +
 382 +               ni = &an->an_node;
 383 +               ath_wprobe_node_leave(vap, ni);
 384 +               rcu_read_unlock();
 385 +               goto restart;
 386 +       }
 387 +       rcu_read_unlock();
 388 +
 389 +       /* wait for the cleanup tasks to finish */
 390 +       while (atomic_read(&cleanup_tasks) != 0) {
 391 +               schedule();
 392 +       }
 393 +
 394 +       wprobe_remove_iface(dev);
 395 +}
 396 --- a/ath/if_ath.c
 397 +++ b/ath/if_ath.c
 398 @@ -400,6 +400,7 @@ static int countrycode = -1;
 399  static int maxvaps = -1;
 400  static int outdoor = -1;
 401  static int xchanmode = -1;
 402 +#include "ath_wprobe.c"
 403  static int beacon_cal = 1;
 404
 405  static const struct ath_hw_detect generic_hw_info = {
 406 @@ -1525,6 +1526,7 @@ ath_vap_create(struct ieee80211com *ic,
 407                 ath_hal_intrset(ah, sc->sc_imask);
 408         }
 409
 410 +       ath_init_wprobe_dev(avp);
 411         return vap;
 412  }
 413
 414 @@ -1605,6 +1607,7 @@ ath_vap_delete(struct ieee80211vap *vap)
 415                 decrease = 0;
 416
 417         ieee80211_vap_detach(vap);
 418 +       ath_remove_wprobe_dev(ATH_VAP(vap));
 419         /* NB: memory is reclaimed through dev->destructor callback */
 420         if (decrease)
 421                 sc->sc_nvaps--;
 422 @@ -5939,6 +5942,7 @@ ath_node_cleanup(struct ieee80211_node *
 423         /* Clean up node-specific rate things - this currently appears to
 424          * always be a no-op */
 425         sc->sc_rc->ops->node_cleanup(sc, ATH_NODE(ni));
 426 +       ath_wprobe_node_leave(ni->ni_vap, ni);
 427
 428         ATH_NODE_UAPSD_LOCK_IRQ(an);
 429  #ifdef IEEE80211_DEBUG_REFCNT
 430 @@ -7009,6 +7013,8 @@ drop_micfail:
 431                                 goto lookup_slowpath;
 432                         }
 433                         ATH_RSSI_LPF(ATH_NODE(ni)->an_avgrssi, rs->rs_rssi);
 434 +                       ath_node_sample_rx(ni, rs);
 435 +                       ath_wprobe_report_rx(ni->ni_vap, skb);
 436                         type = ieee80211_input(ni->ni_vap, ni, skb, rs->rs_rssi, bf->bf_tsf);
 437                         ieee80211_unref_node(&ni);
 438                 } else {
 439 @@ -7019,15 +7025,22 @@ drop_micfail:
 440
 441  lookup_slowpath:
 442                         vap = ieee80211_find_rxvap(ic, wh->i_addr1);
 443 -                       if (vap)
 444 +                       if (vap) {
 445 +                               ath_wprobe_report_rx(vap, skb);
 446                                 ni = ieee80211_find_rxnode(ic, vap, wh);
 447 -                       else
 448 +                       } else {
 449 +                               TAILQ_FOREACH(vap, &ic->ic_vaps, iv_next) {
 450 +                                       ath_wprobe_report_rx(vap, skb);
 451 +                               }
 452 +                               vap = NULL;
 453                                 ni = NULL;
 454 +                       }
 455
 456                         if (ni != NULL) {
 457                                 ieee80211_keyix_t keyix;
 458
 459                                 ATH_RSSI_LPF(ATH_NODE(ni)->an_avgrssi, rs->rs_rssi);
 460 +                               ath_node_sample_rx(ni, rs);
 461                                 type = ieee80211_input(vap, ni, skb, rs->rs_rssi, bf->bf_tsf);
 462                                 /*
 463                                  * If the station has a key cache slot assigned
 464 @@ -8607,6 +8620,7 @@ ath_tx_processq(struct ath_softc *sc, st
 465                                 sc->sc_stats.ast_tx_rssi = ts->ts_rssi;
 466                                 ATH_RSSI_LPF(an->an_halstats.ns_avgtxrssi,
 467                                         ts->ts_rssi);
 468 +                                       ath_node_sample_tx(&an->an_node, ts, bf->bf_skb->len);
 469                                 if (bf->bf_skb->priority == WME_AC_VO ||
 470                                     bf->bf_skb->priority == WME_AC_VI)
 471                                         ni->ni_ic->ic_wme.wme_hipri_traffic++;
 472 @@ -10106,6 +10120,7 @@ ath_newassoc(struct ieee80211_node *ni,
 473         struct ath_softc *sc = ic->ic_dev->priv;
 474
 475         sc->sc_rc->ops->newassoc(sc, ATH_NODE(ni), isnew);
 476 +       ath_wprobe_node_join(ni->ni_vap, ni);
 477
 478         /* are we supporting compression? */
 479         if (!(vap->iv_ath_cap & ni->ni_ath_flags & IEEE80211_NODE_COMP))
 480 --- a/ath/if_athvar.h
 481 +++ b/ath/if_athvar.h
 482 @@ -46,6 +46,7 @@
 483  #include "ah_desc.h"
 484  #include "ah_os.h"
 485  #include "if_athioctl.h"
 486 +#include <linux/wprobe.h>
 487  #include "net80211/ieee80211.h"                /* XXX for WME_NUM_AC */
 488  #include <asm/io.h>
 489  #include <linux/list.h>
 490 @@ -352,6 +353,9 @@ typedef STAILQ_HEAD(, ath_buf) ath_bufhe
 491  /* driver-specific node state */
 492  struct ath_node {
 493         struct ieee80211_node an_node;          /* base class */
 494 +       struct wprobe_link an_wplink;
 495 +       uint8_t an_wplink_active;
 496 +       struct work_struct an_destroy;
 497         u_int16_t an_decomp_index;              /* decompression mask index */
 498         u_int32_t an_avgrssi;                   /* average rssi over all rx frames */
 499         u_int8_t  an_prevdatarix;               /* rate ix of last data frame */
 500 @@ -521,6 +525,9 @@ struct ath_vap {
 501  #else
 502         unsigned int av_beacon_alloc;
 503  #endif
 504 +       struct wprobe_iface av_wpif;
 505 +       u32 av_rxframes;
 506 +       u32 av_rxprobereq;
 507  };
 508  #define        ATH_VAP(_v)     ((struct ath_vap *)(_v))
 509