2 * Copyright (c) 2008, Atheros Communications Inc.
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 /* Implementation of the main "ATH" layer. */
22 static int ath_outdoor; /* enable outdoor use */
24 static u32 ath_chainmask_sel_up_rssi_thres =
25 ATH_CHAINMASK_SEL_UP_RSSI_THRES;
26 static u32 ath_chainmask_sel_down_rssi_thres =
27 ATH_CHAINMASK_SEL_DOWN_RSSI_THRES;
28 static u32 ath_chainmask_sel_period =
29 ATH_CHAINMASK_SEL_TIMEOUT;
31 /* return bus cachesize in 4B word units */
33 static void bus_read_cachesize(struct ath_softc *sc, int *csz)
37 pci_read_config_byte(sc->pdev, PCI_CACHE_LINE_SIZE, (u8 *)&u8tmp);
41 * This check was put in to avoid "unplesant" consequences if
42 * the bootrom has not fully initialized all PCI devices.
43 * Sometimes the cache line size register is not set
47 *csz = DEFAULT_CACHELINE >> 2; /* Use the default size */
51 * Set current operating mode
53 * This function initializes and fills the rate table in the ATH object based
54 * on the operating mode. The blink rates are also set up here, although
55 * they have been superceeded by the ath_led module.
58 static void ath_setcurmode(struct ath_softc *sc, enum wireless_mode mode)
60 const struct ath9k_rate_table *rt;
63 memset(sc->sc_rixmap, 0xff, sizeof(sc->sc_rixmap));
64 rt = ath9k_hw_getratetable(sc->sc_ah, mode);
67 for (i = 0; i < rt->rateCount; i++)
68 sc->sc_rixmap[rt->info[i].rateCode] = (u8) i;
70 memzero(sc->sc_hwmap, sizeof(sc->sc_hwmap));
71 for (i = 0; i < 256; i++) {
72 u8 ix = rt->rateCodeToIndex[i];
77 sc->sc_hwmap[i].ieeerate =
78 rt->info[ix].dot11Rate & IEEE80211_RATE_VAL;
79 sc->sc_hwmap[i].rateKbps = rt->info[ix].rateKbps;
81 if (rt->info[ix].shortPreamble ||
82 rt->info[ix].phy == PHY_OFDM) {
83 /* XXX: Handle this */
86 /* NB: this uses the last entry if the rate isn't found */
87 /* XXX beware of overlow */
90 sc->sc_curmode = mode;
92 * All protection frames are transmited at 2Mb/s for
93 * 11g, otherwise at 1Mb/s.
94 * XXX select protection rate index from rate table.
96 sc->sc_protrix = (mode == ATH9K_MODE_11G ? 1 : 0);
100 * Set up rate table (legacy rates)
102 static void ath_setup_rates(struct ath_softc *sc, enum ieee80211_band band)
104 struct ath_hal *ah = sc->sc_ah;
105 const struct ath9k_rate_table *rt = NULL;
106 struct ieee80211_supported_band *sband;
107 struct ieee80211_rate *rate;
111 case IEEE80211_BAND_2GHZ:
112 rt = ath9k_hw_getratetable(ah, ATH9K_MODE_11G);
114 case IEEE80211_BAND_5GHZ:
115 rt = ath9k_hw_getratetable(ah, ATH9K_MODE_11A);
124 sband = &sc->sbands[band];
125 rate = sc->rates[band];
127 if (rt->rateCount > ATH_RATE_MAX)
128 maxrates = ATH_RATE_MAX;
130 maxrates = rt->rateCount;
132 for (i = 0; i < maxrates; i++) {
133 rate[i].bitrate = rt->info[i].rateKbps / 100;
134 rate[i].hw_value = rt->info[i].rateCode;
136 DPRINTF(sc, ATH_DBG_CONFIG,
137 "%s: Rate: %2dMbps, ratecode: %2d\n",
139 rate[i].bitrate / 10,
145 * Set up channel list
147 static int ath_setup_channels(struct ath_softc *sc)
149 struct ath_hal *ah = sc->sc_ah;
150 int nchan, i, a = 0, b = 0;
151 u8 regclassids[ATH_REGCLASSIDS_MAX];
153 struct ieee80211_supported_band *band_2ghz;
154 struct ieee80211_supported_band *band_5ghz;
155 struct ieee80211_channel *chan_2ghz;
156 struct ieee80211_channel *chan_5ghz;
157 struct ath9k_channel *c;
159 /* Fill in ah->ah_channels */
160 if (!ath9k_regd_init_channels(ah,
169 u32 rd = ah->ah_currentRD;
171 DPRINTF(sc, ATH_DBG_FATAL,
172 "%s: unable to collect channel list; "
173 "regdomain likely %u country code %u\n",
174 __func__, rd, CTRY_DEFAULT);
178 band_2ghz = &sc->sbands[IEEE80211_BAND_2GHZ];
179 band_5ghz = &sc->sbands[IEEE80211_BAND_5GHZ];
180 chan_2ghz = sc->channels[IEEE80211_BAND_2GHZ];
181 chan_5ghz = sc->channels[IEEE80211_BAND_5GHZ];
183 for (i = 0; i < nchan; i++) {
184 c = &ah->ah_channels[i];
185 if (IS_CHAN_2GHZ(c)) {
186 chan_2ghz[a].band = IEEE80211_BAND_2GHZ;
187 chan_2ghz[a].center_freq = c->channel;
188 chan_2ghz[a].max_power = c->maxTxPower;
190 if (c->privFlags & CHANNEL_DISALLOW_ADHOC)
191 chan_2ghz[a].flags |=
192 IEEE80211_CHAN_NO_IBSS;
193 if (c->channelFlags & CHANNEL_PASSIVE)
194 chan_2ghz[a].flags |=
195 IEEE80211_CHAN_PASSIVE_SCAN;
197 band_2ghz->n_channels = ++a;
199 DPRINTF(sc, ATH_DBG_CONFIG,
200 "%s: 2MHz channel: %d, "
201 "channelFlags: 0x%x\n",
205 } else if (IS_CHAN_5GHZ(c)) {
206 chan_5ghz[b].band = IEEE80211_BAND_5GHZ;
207 chan_5ghz[b].center_freq = c->channel;
208 chan_5ghz[b].max_power = c->maxTxPower;
210 if (c->privFlags & CHANNEL_DISALLOW_ADHOC)
211 chan_5ghz[b].flags |=
212 IEEE80211_CHAN_NO_IBSS;
213 if (c->channelFlags & CHANNEL_PASSIVE)
214 chan_5ghz[b].flags |=
215 IEEE80211_CHAN_PASSIVE_SCAN;
217 band_5ghz->n_channels = ++b;
219 DPRINTF(sc, ATH_DBG_CONFIG,
220 "%s: 5MHz channel: %d, "
221 "channelFlags: 0x%x\n",
232 * Determine mode from channel flags
234 * This routine will provide the enumerated WIRELESSS_MODE value based
235 * on the settings of the channel flags. If ho valid set of flags
236 * exist, the lowest mode (11b) is selected.
239 static enum wireless_mode ath_chan2mode(struct ath9k_channel *chan)
241 if (chan->chanmode == CHANNEL_A)
242 return ATH9K_MODE_11A;
243 else if (chan->chanmode == CHANNEL_G)
244 return ATH9K_MODE_11G;
245 else if (chan->chanmode == CHANNEL_B)
246 return ATH9K_MODE_11B;
247 else if (chan->chanmode == CHANNEL_A_HT20)
248 return ATH9K_MODE_11NA_HT20;
249 else if (chan->chanmode == CHANNEL_G_HT20)
250 return ATH9K_MODE_11NG_HT20;
251 else if (chan->chanmode == CHANNEL_A_HT40PLUS)
252 return ATH9K_MODE_11NA_HT40PLUS;
253 else if (chan->chanmode == CHANNEL_A_HT40MINUS)
254 return ATH9K_MODE_11NA_HT40MINUS;
255 else if (chan->chanmode == CHANNEL_G_HT40PLUS)
256 return ATH9K_MODE_11NG_HT40PLUS;
257 else if (chan->chanmode == CHANNEL_G_HT40MINUS)
258 return ATH9K_MODE_11NG_HT40MINUS;
260 /* NB: should not get here */
261 return ATH9K_MODE_11B;
265 * Stop the device, grabbing the top-level lock to protect
266 * against concurrent entry through ath_init (which can happen
267 * if another thread does a system call and the thread doing the
268 * stop is preempted).
271 static int ath_stop(struct ath_softc *sc)
273 struct ath_hal *ah = sc->sc_ah;
275 DPRINTF(sc, ATH_DBG_CONFIG, "%s: invalid %ld\n",
276 __func__, sc->sc_flags & SC_OP_INVALID);
279 * Shutdown the hardware and driver:
280 * stop output from above
281 * reset 802.11 state machine
282 * (sends station deassoc/deauth frames)
285 * clear transmit machinery
286 * clear receive machinery
288 * reclaim beacon resources
290 * Note that some of this work is not possible if the
291 * hardware is gone (invalid).
294 if (!(sc->sc_flags & SC_OP_INVALID))
295 ath9k_hw_set_interrupts(ah, 0);
296 ath_draintxq(sc, false);
297 if (!(sc->sc_flags & SC_OP_INVALID)) {
299 ath9k_hw_phy_disable(ah);
301 sc->sc_rxlink = NULL;
307 * Set the current channel
309 * Set/change channels. If the channel is really being changed, it's done
310 * by reseting the chip. To accomplish this we must first cleanup any pending
311 * DMA, then restart stuff after a la ath_init.
313 int ath_set_channel(struct ath_softc *sc, struct ath9k_channel *hchan)
315 struct ath_hal *ah = sc->sc_ah;
316 bool fastcc = true, stopped;
317 enum ath9k_ht_macmode ht_macmode;
319 if (sc->sc_flags & SC_OP_INVALID) /* the device is invalid or removed */
322 DPRINTF(sc, ATH_DBG_CONFIG,
323 "%s: %u (%u MHz) -> %u (%u MHz), cflags:%x\n",
325 ath9k_hw_mhz2ieee(ah, sc->sc_curchan.channel,
326 sc->sc_curchan.channelFlags),
327 sc->sc_curchan.channel,
328 ath9k_hw_mhz2ieee(ah, hchan->channel, hchan->channelFlags),
329 hchan->channel, hchan->channelFlags);
331 ht_macmode = ath_cwm_macmode(sc);
333 if (hchan->channel != sc->sc_curchan.channel ||
334 hchan->channelFlags != sc->sc_curchan.channelFlags ||
335 (sc->sc_flags & SC_OP_CHAINMASK_UPDATE) ||
336 (sc->sc_flags & SC_OP_FULL_RESET)) {
339 * This is only performed if the channel settings have
342 * To switch channels clear any pending DMA operations;
343 * wait long enough for the RX fifo to drain, reset the
344 * hardware at the new frequency, and then re-enable
345 * the relevant bits of the h/w.
347 ath9k_hw_set_interrupts(ah, 0); /* disable interrupts */
348 ath_draintxq(sc, false); /* clear pending tx frames */
349 stopped = ath_stoprecv(sc); /* turn off frame recv */
351 /* XXX: do not flush receive queue here. We don't want
352 * to flush data frames already in queue because of
353 * changing channel. */
355 if (!stopped || (sc->sc_flags & SC_OP_FULL_RESET))
358 spin_lock_bh(&sc->sc_resetlock);
359 if (!ath9k_hw_reset(ah, hchan,
360 ht_macmode, sc->sc_tx_chainmask,
362 sc->sc_ht_extprotspacing,
364 DPRINTF(sc, ATH_DBG_FATAL,
365 "%s: unable to reset channel %u (%uMhz) "
366 "flags 0x%x hal status %u\n", __func__,
367 ath9k_hw_mhz2ieee(ah, hchan->channel,
368 hchan->channelFlags),
369 hchan->channel, hchan->channelFlags, status);
370 spin_unlock_bh(&sc->sc_resetlock);
373 spin_unlock_bh(&sc->sc_resetlock);
375 sc->sc_curchan = *hchan;
376 sc->sc_flags &= ~SC_OP_CHAINMASK_UPDATE;
377 sc->sc_flags &= ~SC_OP_FULL_RESET;
379 /* Re-enable rx framework */
380 if (ath_startrecv(sc) != 0) {
381 DPRINTF(sc, ATH_DBG_FATAL,
382 "%s: unable to restart recv logic\n", __func__);
386 * Change channels and update the h/w rate map
387 * if we're switching; e.g. 11a to 11b/g.
389 ath_setcurmode(sc, ath_chan2mode(hchan));
391 ath_update_txpow(sc); /* update tx power state */
393 * Re-enable interrupts.
395 ath9k_hw_set_interrupts(ah, sc->sc_imask);
400 /**********************/
401 /* Chainmask Handling */
402 /**********************/
404 static void ath_chainmask_sel_timertimeout(unsigned long data)
406 struct ath_chainmask_sel *cm = (struct ath_chainmask_sel *)data;
407 cm->switch_allowed = 1;
410 /* Start chainmask select timer */
411 static void ath_chainmask_sel_timerstart(struct ath_chainmask_sel *cm)
413 cm->switch_allowed = 0;
414 mod_timer(&cm->timer, ath_chainmask_sel_period);
417 /* Stop chainmask select timer */
418 static void ath_chainmask_sel_timerstop(struct ath_chainmask_sel *cm)
420 cm->switch_allowed = 0;
421 del_timer_sync(&cm->timer);
424 static void ath_chainmask_sel_init(struct ath_softc *sc, struct ath_node *an)
426 struct ath_chainmask_sel *cm = &an->an_chainmask_sel;
428 memzero(cm, sizeof(struct ath_chainmask_sel));
430 cm->cur_tx_mask = sc->sc_tx_chainmask;
431 cm->cur_rx_mask = sc->sc_rx_chainmask;
432 cm->tx_avgrssi = ATH_RSSI_DUMMY_MARKER;
433 setup_timer(&cm->timer,
434 ath_chainmask_sel_timertimeout, (unsigned long) cm);
437 int ath_chainmask_sel_logic(struct ath_softc *sc, struct ath_node *an)
439 struct ath_chainmask_sel *cm = &an->an_chainmask_sel;
442 * Disable auto-swtiching in one of the following if conditions.
443 * sc_chainmask_auto_sel is used for internal global auto-switching
444 * enabled/disabled setting
446 if (sc->sc_ah->ah_caps.tx_chainmask != ATH_CHAINMASK_SEL_3X3) {
447 cm->cur_tx_mask = sc->sc_tx_chainmask;
448 return cm->cur_tx_mask;
451 if (cm->tx_avgrssi == ATH_RSSI_DUMMY_MARKER)
452 return cm->cur_tx_mask;
454 if (cm->switch_allowed) {
455 /* Switch down from tx 3 to tx 2. */
456 if (cm->cur_tx_mask == ATH_CHAINMASK_SEL_3X3 &&
457 ATH_RSSI_OUT(cm->tx_avgrssi) >=
458 ath_chainmask_sel_down_rssi_thres) {
459 cm->cur_tx_mask = sc->sc_tx_chainmask;
461 /* Don't let another switch happen until
462 * this timer expires */
463 ath_chainmask_sel_timerstart(cm);
465 /* Switch up from tx 2 to 3. */
466 else if (cm->cur_tx_mask == sc->sc_tx_chainmask &&
467 ATH_RSSI_OUT(cm->tx_avgrssi) <=
468 ath_chainmask_sel_up_rssi_thres) {
469 cm->cur_tx_mask = ATH_CHAINMASK_SEL_3X3;
471 /* Don't let another switch happen
472 * until this timer expires */
473 ath_chainmask_sel_timerstart(cm);
477 return cm->cur_tx_mask;
481 * Update tx/rx chainmask. For legacy association,
482 * hard code chainmask to 1x1, for 11n association, use
483 * the chainmask configuration.
486 void ath_update_chainmask(struct ath_softc *sc, int is_ht)
488 sc->sc_flags |= SC_OP_CHAINMASK_UPDATE;
490 sc->sc_tx_chainmask = sc->sc_ah->ah_caps.tx_chainmask;
491 sc->sc_rx_chainmask = sc->sc_ah->ah_caps.rx_chainmask;
493 sc->sc_tx_chainmask = 1;
494 sc->sc_rx_chainmask = 1;
497 DPRINTF(sc, ATH_DBG_CONFIG, "%s: tx chmask: %d, rx chmask: %d\n",
498 __func__, sc->sc_tx_chainmask, sc->sc_rx_chainmask);
508 * This routine brings the VAP out of the down state into a "listen" state
509 * where it waits for association requests. This is used in AP and AdHoc
513 int ath_vap_listen(struct ath_softc *sc, int if_id)
515 struct ath_hal *ah = sc->sc_ah;
518 DECLARE_MAC_BUF(mac);
520 avp = sc->sc_vaps[if_id];
522 DPRINTF(sc, ATH_DBG_FATAL, "%s: invalid interface id %u\n",
527 #ifdef CONFIG_SLOW_ANT_DIV
528 ath_slow_ant_div_stop(&sc->sc_antdiv);
531 /* update ratectrl about the new state */
532 ath_rate_newstate(sc, avp);
534 rfilt = ath_calcrxfilter(sc);
535 ath9k_hw_setrxfilter(ah, rfilt);
537 if (sc->sc_ah->ah_opmode == ATH9K_M_STA ||
538 sc->sc_ah->ah_opmode == ATH9K_M_IBSS) {
539 memcpy(sc->sc_curbssid, ath_bcast_mac, ETH_ALEN);
540 ath9k_hw_write_associd(ah, sc->sc_curbssid, sc->sc_curaid);
544 DPRINTF(sc, ATH_DBG_CONFIG,
545 "%s: RX filter 0x%x bssid %s aid 0x%x\n",
546 __func__, rfilt, print_mac(mac,
547 sc->sc_curbssid), sc->sc_curaid);
551 * Disable BMISS interrupt when we're not associated
553 ath9k_hw_set_interrupts(ah,
554 sc->sc_imask & ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS));
555 sc->sc_imask &= ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS);
556 /* need to reconfigure the beacons when it moves to RUN */
557 sc->sc_flags &= ~SC_OP_BEACONS;
562 int ath_vap_attach(struct ath_softc *sc,
564 struct ieee80211_vif *if_data,
565 enum ath9k_opmode opmode)
569 if (if_id >= ATH_BCBUF || sc->sc_vaps[if_id] != NULL) {
570 DPRINTF(sc, ATH_DBG_FATAL,
571 "%s: Invalid interface id = %u\n", __func__, if_id);
578 case ATH9K_M_MONITOR:
581 /* XXX not right, beacon buffer is allocated on RUN trans */
582 if (list_empty(&sc->sc_bbuf))
590 avp = kmalloc(sizeof(struct ath_vap), GFP_KERNEL);
594 memzero(avp, sizeof(struct ath_vap));
595 avp->av_if_data = if_data;
596 /* Set the VAP opmode */
597 avp->av_opmode = opmode;
599 INIT_LIST_HEAD(&avp->av_mcastq.axq_q);
600 INIT_LIST_HEAD(&avp->av_mcastq.axq_acq);
601 spin_lock_init(&avp->av_mcastq.axq_lock);
603 ath9k_hw_set_tsfadjust(sc->sc_ah, 1);
605 sc->sc_vaps[if_id] = avp;
607 /* Set the device opmode */
608 sc->sc_ah->ah_opmode = opmode;
610 /* default VAP configuration */
611 avp->av_config.av_fixed_rateset = IEEE80211_FIXED_RATE_NONE;
612 avp->av_config.av_fixed_retryset = 0x03030303;
617 int ath_vap_detach(struct ath_softc *sc, int if_id)
619 struct ath_hal *ah = sc->sc_ah;
622 avp = sc->sc_vaps[if_id];
624 DPRINTF(sc, ATH_DBG_FATAL, "%s: invalid interface id %u\n",
630 * Quiesce the hardware while we remove the vap. In
631 * particular we need to reclaim all references to the
632 * vap state by any frames pending on the tx queues.
634 * XXX can we do this w/o affecting other vap's?
636 ath9k_hw_set_interrupts(ah, 0); /* disable interrupts */
637 ath_draintxq(sc, false); /* stop xmit side */
638 ath_stoprecv(sc); /* stop recv side */
639 ath_flushrecv(sc); /* flush recv queue */
641 /* Reclaim any pending mcast bufs on the vap. */
642 ath_tx_draintxq(sc, &avp->av_mcastq, false);
645 sc->sc_vaps[if_id] = NULL;
651 int ath_vap_config(struct ath_softc *sc,
652 int if_id, struct ath_vap_config *if_config)
656 if (if_id >= ATH_BCBUF) {
657 DPRINTF(sc, ATH_DBG_FATAL,
658 "%s: Invalid interface id = %u\n", __func__, if_id);
662 avp = sc->sc_vaps[if_id];
666 memcpy(&avp->av_config, if_config, sizeof(avp->av_config));
675 int ath_open(struct ath_softc *sc, struct ath9k_channel *initial_chan)
677 struct ath_hal *ah = sc->sc_ah;
680 enum ath9k_ht_macmode ht_macmode = ath_cwm_macmode(sc);
682 DPRINTF(sc, ATH_DBG_CONFIG, "%s: mode %d\n",
683 __func__, sc->sc_ah->ah_opmode);
686 * Stop anything previously setup. This is safe
687 * whether this is the first time through or not.
691 /* Initialize chanmask selection */
692 sc->sc_tx_chainmask = ah->ah_caps.tx_chainmask;
693 sc->sc_rx_chainmask = ah->ah_caps.rx_chainmask;
695 /* Reset SERDES registers */
696 ath9k_hw_configpcipowersave(ah, 0);
699 * The basic interface to setting the hardware in a good
700 * state is ``reset''. On return the hardware is known to
701 * be powered up and with interrupts disabled. This must
702 * be followed by initialization of the appropriate bits
703 * and then setup of the interrupt mask.
705 sc->sc_curchan = *initial_chan;
707 spin_lock_bh(&sc->sc_resetlock);
708 if (!ath9k_hw_reset(ah, &sc->sc_curchan, ht_macmode,
709 sc->sc_tx_chainmask, sc->sc_rx_chainmask,
710 sc->sc_ht_extprotspacing, false, &status)) {
711 DPRINTF(sc, ATH_DBG_FATAL,
712 "%s: unable to reset hardware; hal status %u "
713 "(freq %u flags 0x%x)\n", __func__, status,
714 sc->sc_curchan.channel, sc->sc_curchan.channelFlags);
716 spin_unlock_bh(&sc->sc_resetlock);
719 spin_unlock_bh(&sc->sc_resetlock);
721 * This is needed only to setup initial state
722 * but it's best done after a reset.
724 ath_update_txpow(sc);
727 * Setup the hardware after reset:
728 * The receive engine is set going.
729 * Frame transmit is handled entirely
730 * in the frame output path; there's nothing to do
731 * here except setup the interrupt mask.
733 if (ath_startrecv(sc) != 0) {
734 DPRINTF(sc, ATH_DBG_FATAL,
735 "%s: unable to start recv logic\n", __func__);
739 /* Setup our intr mask. */
740 sc->sc_imask = ATH9K_INT_RX | ATH9K_INT_TX
741 | ATH9K_INT_RXEOL | ATH9K_INT_RXORN
742 | ATH9K_INT_FATAL | ATH9K_INT_GLOBAL;
744 if (ah->ah_caps.hw_caps & ATH9K_HW_CAP_GTT)
745 sc->sc_imask |= ATH9K_INT_GTT;
747 if (ah->ah_caps.hw_caps & ATH9K_HW_CAP_HT)
748 sc->sc_imask |= ATH9K_INT_CST;
751 * Enable MIB interrupts when there are hardware phy counters.
752 * Note we only do this (at the moment) for station mode.
754 if (ath9k_hw_phycounters(ah) &&
755 ((sc->sc_ah->ah_opmode == ATH9K_M_STA) ||
756 (sc->sc_ah->ah_opmode == ATH9K_M_IBSS)))
757 sc->sc_imask |= ATH9K_INT_MIB;
759 * Some hardware processes the TIM IE and fires an
760 * interrupt when the TIM bit is set. For hardware
761 * that does, if not overridden by configuration,
762 * enable the TIM interrupt when operating as station.
764 if ((ah->ah_caps.hw_caps & ATH9K_HW_CAP_ENHANCEDPM) &&
765 (sc->sc_ah->ah_opmode == ATH9K_M_STA) &&
766 !sc->sc_config.swBeaconProcess)
767 sc->sc_imask |= ATH9K_INT_TIM;
769 * Don't enable interrupts here as we've not yet built our
770 * vap and node data structures, which will be needed as soon
771 * as we start receiving.
773 ath_setcurmode(sc, ath_chan2mode(initial_chan));
775 /* XXX: we must make sure h/w is ready and clear invalid flag
776 * before turning on interrupt. */
777 sc->sc_flags &= ~SC_OP_INVALID;
782 int ath_reset(struct ath_softc *sc, bool retry_tx)
784 struct ath_hal *ah = sc->sc_ah;
787 enum ath9k_ht_macmode ht_macmode = ath_cwm_macmode(sc);
789 ath9k_hw_set_interrupts(ah, 0); /* disable interrupts */
790 ath_draintxq(sc, retry_tx); /* stop xmit */
791 ath_stoprecv(sc); /* stop recv */
792 ath_flushrecv(sc); /* flush recv queue */
795 spin_lock_bh(&sc->sc_resetlock);
796 if (!ath9k_hw_reset(ah, &sc->sc_curchan,
798 sc->sc_tx_chainmask, sc->sc_rx_chainmask,
799 sc->sc_ht_extprotspacing, false, &status)) {
800 DPRINTF(sc, ATH_DBG_FATAL,
801 "%s: unable to reset hardware; hal status %u\n",
805 spin_unlock_bh(&sc->sc_resetlock);
807 if (ath_startrecv(sc) != 0) /* restart recv */
808 DPRINTF(sc, ATH_DBG_FATAL,
809 "%s: unable to start recv logic\n", __func__);
812 * We may be doing a reset in response to a request
813 * that changes the channel so update any state that
814 * might change as a result.
816 ath_setcurmode(sc, ath_chan2mode(&sc->sc_curchan));
818 ath_update_txpow(sc);
820 if (sc->sc_flags & SC_OP_BEACONS)
821 ath_beacon_config(sc, ATH_IF_ID_ANY); /* restart beacons */
823 ath9k_hw_set_interrupts(ah, sc->sc_imask);
825 /* Restart the txq */
828 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) {
829 if (ATH_TXQ_SETUP(sc, i)) {
830 spin_lock_bh(&sc->sc_txq[i].axq_lock);
831 ath_txq_schedule(sc, &sc->sc_txq[i]);
832 spin_unlock_bh(&sc->sc_txq[i].axq_lock);
840 int ath_suspend(struct ath_softc *sc)
842 struct ath_hal *ah = sc->sc_ah;
844 /* No I/O if device has been surprise removed */
845 if (sc->sc_flags & SC_OP_INVALID)
848 /* Shut off the interrupt before setting sc->sc_invalid to '1' */
849 ath9k_hw_set_interrupts(ah, 0);
851 /* XXX: we must make sure h/w will not generate any interrupt
852 * before setting the invalid flag. */
853 sc->sc_flags |= SC_OP_INVALID;
855 /* disable HAL and put h/w to sleep */
856 ath9k_hw_disable(sc->sc_ah);
858 ath9k_hw_configpcipowersave(sc->sc_ah, 1);
863 /* Interrupt handler. Most of the actual processing is deferred.
864 * It's the caller's responsibility to ensure the chip is awake. */
866 irqreturn_t ath_isr(int irq, void *dev)
868 struct ath_softc *sc = dev;
869 struct ath_hal *ah = sc->sc_ah;
870 enum ath9k_int status;
874 if (sc->sc_flags & SC_OP_INVALID) {
876 * The hardware is not ready/present, don't
877 * touch anything. Note this can happen early
878 * on if the IRQ is shared.
882 if (!ath9k_hw_intrpend(ah)) { /* shared irq, not for us */
887 * Figure out the reason(s) for the interrupt. Note
888 * that the hal returns a pseudo-ISR that may include
889 * bits we haven't explicitly enabled so we mask the
890 * value to insure we only process bits we requested.
892 ath9k_hw_getisr(ah, &status); /* NB: clears ISR too */
894 status &= sc->sc_imask; /* discard unasked-for bits */
897 * If there are no status bits set, then this interrupt was not
898 * for me (should have been caught above).
904 sc->sc_intrstatus = status;
906 if (status & ATH9K_INT_FATAL) {
907 /* need a chip reset */
909 } else if (status & ATH9K_INT_RXORN) {
910 /* need a chip reset */
913 if (status & ATH9K_INT_SWBA) {
914 /* schedule a tasklet for beacon handling */
915 tasklet_schedule(&sc->bcon_tasklet);
917 if (status & ATH9K_INT_RXEOL) {
919 * NB: the hardware should re-read the link when
920 * RXE bit is written, but it doesn't work
921 * at least on older hardware revs.
926 if (status & ATH9K_INT_TXURN)
927 /* bump tx trigger level */
928 ath9k_hw_updatetxtriglevel(ah, true);
929 /* XXX: optimize this */
930 if (status & ATH9K_INT_RX)
932 if (status & ATH9K_INT_TX)
934 if (status & ATH9K_INT_BMISS)
936 /* carrier sense timeout */
937 if (status & ATH9K_INT_CST)
939 if (status & ATH9K_INT_MIB) {
941 * Disable interrupts until we service the MIB
942 * interrupt; otherwise it will continue to
945 ath9k_hw_set_interrupts(ah, 0);
947 * Let the hal handle the event. We assume
948 * it will clear whatever condition caused
951 ath9k_hw_procmibevent(ah, &sc->sc_halstats);
952 ath9k_hw_set_interrupts(ah, sc->sc_imask);
954 if (status & ATH9K_INT_TIM_TIMER) {
955 if (!(ah->ah_caps.hw_caps &
956 ATH9K_HW_CAP_AUTOSLEEP)) {
957 /* Clear RxAbort bit so that we can
959 ath9k_hw_setrxabort(ah, 0);
967 /* turn off every interrupt except SWBA */
968 ath9k_hw_set_interrupts(ah, (sc->sc_imask & ATH9K_INT_SWBA));
969 tasklet_schedule(&sc->intr_tq);
975 /* Deferred interrupt processing */
977 static void ath9k_tasklet(unsigned long data)
979 struct ath_softc *sc = (struct ath_softc *)data;
980 u32 status = sc->sc_intrstatus;
982 if (status & ATH9K_INT_FATAL) {
983 /* need a chip reset */
984 ath_reset(sc, false);
989 (ATH9K_INT_RX | ATH9K_INT_RXEOL | ATH9K_INT_RXORN)) {
990 /* XXX: fill me in */
992 if (status & ATH9K_INT_RXORN) {
994 if (status & ATH9K_INT_RXEOL) {
997 spin_lock_bh(&sc->sc_rxflushlock);
998 ath_rx_tasklet(sc, 0);
999 spin_unlock_bh(&sc->sc_rxflushlock);
1001 /* XXX: optimize this */
1002 if (status & ATH9K_INT_TX)
1004 /* XXX: fill me in */
1006 if (status & ATH9K_INT_BMISS) {
1008 if (status & (ATH9K_INT_TIM | ATH9K_INT_DTIMSYNC)) {
1009 if (status & ATH9K_INT_TIM) {
1011 if (status & ATH9K_INT_DTIMSYNC) {
1017 /* re-enable hardware interrupt */
1018 ath9k_hw_set_interrupts(sc->sc_ah, sc->sc_imask);
1021 int ath_init(u16 devid, struct ath_softc *sc)
1023 struct ath_hal *ah = NULL;
1029 /* XXX: hardware will not be ready until ath_open() being called */
1030 sc->sc_flags |= SC_OP_INVALID;
1032 sc->sc_debug = DBG_DEFAULT;
1033 DPRINTF(sc, ATH_DBG_CONFIG, "%s: devid 0x%x\n", __func__, devid);
1035 /* Initialize tasklet */
1036 tasklet_init(&sc->intr_tq, ath9k_tasklet, (unsigned long)sc);
1037 tasklet_init(&sc->bcon_tasklet, ath9k_beacon_tasklet,
1041 * Cache line size is used to size and align various
1042 * structures used to communicate with the hardware.
1044 bus_read_cachesize(sc, &csz);
1045 /* XXX assert csz is non-zero */
1046 sc->sc_cachelsz = csz << 2; /* convert to bytes */
1048 spin_lock_init(&sc->sc_resetlock);
1050 ah = ath9k_hw_attach(devid, sc, sc->mem, &status);
1052 DPRINTF(sc, ATH_DBG_FATAL,
1053 "%s: unable to attach hardware; HAL status %u\n",
1060 /* Get the chipset-specific aggr limit. */
1061 sc->sc_rtsaggrlimit = ah->ah_caps.rts_aggr_limit;
1063 /* Get the hardware key cache size. */
1064 sc->sc_keymax = ah->ah_caps.keycache_size;
1065 if (sc->sc_keymax > ATH_KEYMAX) {
1066 DPRINTF(sc, ATH_DBG_KEYCACHE,
1067 "%s: Warning, using only %u entries in %u key cache\n",
1068 __func__, ATH_KEYMAX, sc->sc_keymax);
1069 sc->sc_keymax = ATH_KEYMAX;
1073 * Reset the key cache since some parts do not
1074 * reset the contents on initial power up.
1076 for (i = 0; i < sc->sc_keymax; i++)
1077 ath9k_hw_keyreset(ah, (u16) i);
1079 * Mark key cache slots associated with global keys
1080 * as in use. If we knew TKIP was not to be used we
1081 * could leave the +32, +64, and +32+64 slots free.
1082 * XXX only for splitmic.
1084 for (i = 0; i < IEEE80211_WEP_NKID; i++) {
1085 set_bit(i, sc->sc_keymap);
1086 set_bit(i + 32, sc->sc_keymap);
1087 set_bit(i + 64, sc->sc_keymap);
1088 set_bit(i + 32 + 64, sc->sc_keymap);
1091 * Collect the channel list using the default country
1092 * code and including outdoor channels. The 802.11 layer
1093 * is resposible for filtering this list based on settings
1094 * like the phy mode.
1096 rd = ah->ah_currentRD;
1098 error = ath_setup_channels(sc);
1102 /* default to STA mode */
1103 sc->sc_ah->ah_opmode = ATH9K_M_MONITOR;
1105 /* Setup rate tables */
1107 ath_setup_rates(sc, IEEE80211_BAND_2GHZ);
1108 ath_setup_rates(sc, IEEE80211_BAND_5GHZ);
1110 /* NB: setup here so ath_rate_update is happy */
1111 ath_setcurmode(sc, ATH9K_MODE_11A);
1114 * Allocate hardware transmit queues: one queue for
1115 * beacon frames and one data queue for each QoS
1116 * priority. Note that the hal handles reseting
1117 * these queues at the needed time.
1119 sc->sc_bhalq = ath_beaconq_setup(ah);
1120 if (sc->sc_bhalq == -1) {
1121 DPRINTF(sc, ATH_DBG_FATAL,
1122 "%s: unable to setup a beacon xmit queue\n", __func__);
1126 sc->sc_cabq = ath_txq_setup(sc, ATH9K_TX_QUEUE_CAB, 0);
1127 if (sc->sc_cabq == NULL) {
1128 DPRINTF(sc, ATH_DBG_FATAL,
1129 "%s: unable to setup CAB xmit queue\n", __func__);
1134 sc->sc_config.cabqReadytime = ATH_CABQ_READY_TIME;
1135 ath_cabq_update(sc);
1137 for (i = 0; i < ARRAY_SIZE(sc->sc_haltype2q); i++)
1138 sc->sc_haltype2q[i] = -1;
1140 /* Setup data queues */
1141 /* NB: ensure BK queue is the lowest priority h/w queue */
1142 if (!ath_tx_setup(sc, ATH9K_WME_AC_BK)) {
1143 DPRINTF(sc, ATH_DBG_FATAL,
1144 "%s: unable to setup xmit queue for BK traffic\n",
1150 if (!ath_tx_setup(sc, ATH9K_WME_AC_BE)) {
1151 DPRINTF(sc, ATH_DBG_FATAL,
1152 "%s: unable to setup xmit queue for BE traffic\n",
1157 if (!ath_tx_setup(sc, ATH9K_WME_AC_VI)) {
1158 DPRINTF(sc, ATH_DBG_FATAL,
1159 "%s: unable to setup xmit queue for VI traffic\n",
1164 if (!ath_tx_setup(sc, ATH9K_WME_AC_VO)) {
1165 DPRINTF(sc, ATH_DBG_FATAL,
1166 "%s: unable to setup xmit queue for VO traffic\n",
1172 sc->sc_rc = ath_rate_attach(ah);
1173 if (sc->sc_rc == NULL) {
1178 if (ath9k_hw_getcapability(ah, ATH9K_CAP_CIPHER,
1179 ATH9K_CIPHER_TKIP, NULL)) {
1181 * Whether we should enable h/w TKIP MIC.
1182 * XXX: if we don't support WME TKIP MIC, then we wouldn't
1183 * report WMM capable, so it's always safe to turn on
1184 * TKIP MIC in this case.
1186 ath9k_hw_setcapability(sc->sc_ah, ATH9K_CAP_TKIP_MIC,
1191 * Check whether the separate key cache entries
1192 * are required to handle both tx+rx MIC keys.
1193 * With split mic keys the number of stations is limited
1194 * to 27 otherwise 59.
1196 if (ath9k_hw_getcapability(ah, ATH9K_CAP_CIPHER,
1197 ATH9K_CIPHER_TKIP, NULL)
1198 && ath9k_hw_getcapability(ah, ATH9K_CAP_CIPHER,
1199 ATH9K_CIPHER_MIC, NULL)
1200 && ath9k_hw_getcapability(ah, ATH9K_CAP_TKIP_SPLIT,
1202 sc->sc_splitmic = 1;
1204 /* turn on mcast key search if possible */
1205 if (!ath9k_hw_getcapability(ah, ATH9K_CAP_MCAST_KEYSRCH, 0, NULL))
1206 (void)ath9k_hw_setcapability(ah, ATH9K_CAP_MCAST_KEYSRCH, 1,
1209 sc->sc_config.txpowlimit = ATH_TXPOWER_MAX;
1210 sc->sc_config.txpowlimit_override = 0;
1212 /* 11n Capabilities */
1213 if (ah->ah_caps.hw_caps & ATH9K_HW_CAP_HT) {
1214 sc->sc_flags |= SC_OP_TXAGGR;
1215 sc->sc_flags |= SC_OP_RXAGGR;
1218 sc->sc_tx_chainmask = ah->ah_caps.tx_chainmask;
1219 sc->sc_rx_chainmask = ah->ah_caps.rx_chainmask;
1221 /* Configuration for rx chain detection */
1222 sc->sc_rxchaindetect_ref = 0;
1223 sc->sc_rxchaindetect_thresh5GHz = 35;
1224 sc->sc_rxchaindetect_thresh2GHz = 35;
1225 sc->sc_rxchaindetect_delta5GHz = 30;
1226 sc->sc_rxchaindetect_delta2GHz = 30;
1228 ath9k_hw_setcapability(ah, ATH9K_CAP_DIVERSITY, 1, true, NULL);
1229 sc->sc_defant = ath9k_hw_getdefantenna(ah);
1231 ath9k_hw_getmac(ah, sc->sc_myaddr);
1232 if (ah->ah_caps.hw_caps & ATH9K_HW_CAP_BSSIDMASK) {
1233 ath9k_hw_getbssidmask(ah, sc->sc_bssidmask);
1234 ATH_SET_VAP_BSSID_MASK(sc->sc_bssidmask);
1235 ath9k_hw_setbssidmask(ah, sc->sc_bssidmask);
1237 sc->sc_slottime = ATH9K_SLOT_TIME_9; /* default to short slot time */
1239 /* initialize beacon slots */
1240 for (i = 0; i < ARRAY_SIZE(sc->sc_bslot); i++)
1241 sc->sc_bslot[i] = ATH_IF_ID_ANY;
1243 /* save MISC configurations */
1244 sc->sc_config.swBeaconProcess = 1;
1246 #ifdef CONFIG_SLOW_ANT_DIV
1247 /* range is 40 - 255, we use something in the middle */
1248 ath_slow_ant_div_init(&sc->sc_antdiv, sc, 0x127);
1253 /* cleanup tx queues */
1254 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++)
1255 if (ATH_TXQ_SETUP(sc, i))
1256 ath_tx_cleanupq(sc, &sc->sc_txq[i]);
1259 ath9k_hw_detach(ah);
1263 void ath_deinit(struct ath_softc *sc)
1265 struct ath_hal *ah = sc->sc_ah;
1268 DPRINTF(sc, ATH_DBG_CONFIG, "%s\n", __func__);
1271 if (!(sc->sc_flags & SC_OP_INVALID))
1272 ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_AWAKE);
1273 ath_rate_detach(sc->sc_rc);
1274 /* cleanup tx queues */
1275 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++)
1276 if (ATH_TXQ_SETUP(sc, i))
1277 ath_tx_cleanupq(sc, &sc->sc_txq[i]);
1278 ath9k_hw_detach(ah);
1281 /*******************/
1282 /* Node Management */
1283 /*******************/
1285 struct ath_node *ath_node_attach(struct ath_softc *sc, u8 *addr, int if_id)
1287 struct ath_vap *avp;
1288 struct ath_node *an;
1289 DECLARE_MAC_BUF(mac);
1291 avp = sc->sc_vaps[if_id];
1292 ASSERT(avp != NULL);
1294 /* mac80211 sta_notify callback is from an IRQ context, so no sleep */
1295 an = kmalloc(sizeof(struct ath_node), GFP_ATOMIC);
1298 memzero(an, sizeof(*an));
1301 memcpy(an->an_addr, addr, ETH_ALEN);
1302 atomic_set(&an->an_refcnt, 1);
1304 /* set up per-node tx/rx state */
1305 ath_tx_node_init(sc, an);
1306 ath_rx_node_init(sc, an);
1308 ath_chainmask_sel_init(sc, an);
1309 ath_chainmask_sel_timerstart(&an->an_chainmask_sel);
1310 list_add(&an->list, &sc->node_list);
1315 void ath_node_detach(struct ath_softc *sc, struct ath_node *an, bool bh_flag)
1317 unsigned long flags;
1319 DECLARE_MAC_BUF(mac);
1321 ath_chainmask_sel_timerstop(&an->an_chainmask_sel);
1322 an->an_flags |= ATH_NODE_CLEAN;
1323 ath_tx_node_cleanup(sc, an, bh_flag);
1324 ath_rx_node_cleanup(sc, an);
1326 ath_tx_node_free(sc, an);
1327 ath_rx_node_free(sc, an);
1329 spin_lock_irqsave(&sc->node_lock, flags);
1331 list_del(&an->list);
1333 spin_unlock_irqrestore(&sc->node_lock, flags);
1338 /* Finds a node and increases the refcnt if found */
1340 struct ath_node *ath_node_get(struct ath_softc *sc, u8 *addr)
1342 struct ath_node *an = NULL, *an_found = NULL;
1344 if (list_empty(&sc->node_list)) /* FIXME */
1346 list_for_each_entry(an, &sc->node_list, list) {
1347 if (!compare_ether_addr(an->an_addr, addr)) {
1348 atomic_inc(&an->an_refcnt);
1357 /* Decrements the refcnt and if it drops to zero, detach the node */
1359 void ath_node_put(struct ath_softc *sc, struct ath_node *an, bool bh_flag)
1361 if (atomic_dec_and_test(&an->an_refcnt))
1362 ath_node_detach(sc, an, bh_flag);
1365 /* Finds a node, doesn't increment refcnt. Caller must hold sc->node_lock */
1366 struct ath_node *ath_node_find(struct ath_softc *sc, u8 *addr)
1368 struct ath_node *an = NULL, *an_found = NULL;
1370 if (list_empty(&sc->node_list))
1373 list_for_each_entry(an, &sc->node_list, list)
1374 if (!compare_ether_addr(an->an_addr, addr)) {
1385 * Setup driver-specific state for a newly associated node. This routine
1386 * really only applies if compression or XR are enabled, there is no code
1387 * covering any other cases.
1390 void ath_newassoc(struct ath_softc *sc,
1391 struct ath_node *an, int isnew, int isuapsd)
1395 /* if station reassociates, tear down the aggregation state. */
1397 for (tidno = 0; tidno < WME_NUM_TID; tidno++) {
1398 if (sc->sc_flags & SC_OP_TXAGGR)
1399 ath_tx_aggr_teardown(sc, an, tidno);
1400 if (sc->sc_flags & SC_OP_RXAGGR)
1401 ath_rx_aggr_teardown(sc, an, tidno);
1411 void ath_key_reset(struct ath_softc *sc, u16 keyix, int freeslot)
1413 ath9k_hw_keyreset(sc->sc_ah, keyix);
1415 clear_bit(keyix, sc->sc_keymap);
1418 int ath_keyset(struct ath_softc *sc,
1420 struct ath9k_keyval *hk,
1421 const u8 mac[ETH_ALEN])
1425 status = ath9k_hw_set_keycache_entry(sc->sc_ah,
1426 keyix, hk, mac, false);
1428 return status != false;
1431 /***********************/
1432 /* TX Power/Regulatory */
1433 /***********************/
1436 * Set Transmit power in HAL
1438 * This routine makes the actual HAL calls to set the new transmit power
1442 void ath_update_txpow(struct ath_softc *sc)
1444 struct ath_hal *ah = sc->sc_ah;
1447 if (sc->sc_curtxpow != sc->sc_config.txpowlimit) {
1448 ath9k_hw_set_txpowerlimit(ah, sc->sc_config.txpowlimit);
1449 /* read back in case value is clamped */
1450 ath9k_hw_getcapability(ah, ATH9K_CAP_TXPOW, 1, &txpow);
1451 sc->sc_curtxpow = txpow;
1455 /* Return the current country and domain information */
1456 void ath_get_currentCountry(struct ath_softc *sc,
1457 struct ath9k_country_entry *ctry)
1459 ath9k_regd_get_current_country(sc->sc_ah, ctry);
1461 /* If HAL not specific yet, since it is band dependent,
1462 * use the one we passed in. */
1463 if (ctry->countryCode == CTRY_DEFAULT) {
1466 } else if (ctry->iso[0] && ctry->iso[1]) {
1467 if (!ctry->iso[2]) {
1476 /**************************/
1477 /* Slow Antenna Diversity */
1478 /**************************/
1480 void ath_slow_ant_div_init(struct ath_antdiv *antdiv,
1481 struct ath_softc *sc,
1486 /* antdivf_rssitrig can range from 40 - 0xff */
1487 trig = (rssitrig > 0xff) ? 0xff : rssitrig;
1488 trig = (rssitrig < 40) ? 40 : rssitrig;
1490 antdiv->antdiv_sc = sc;
1491 antdiv->antdivf_rssitrig = trig;
1494 void ath_slow_ant_div_start(struct ath_antdiv *antdiv,
1498 antdiv->antdiv_num_antcfg =
1499 num_antcfg < ATH_ANT_DIV_MAX_CFG ?
1500 num_antcfg : ATH_ANT_DIV_MAX_CFG;
1501 antdiv->antdiv_state = ATH_ANT_DIV_IDLE;
1502 antdiv->antdiv_curcfg = 0;
1503 antdiv->antdiv_bestcfg = 0;
1504 antdiv->antdiv_laststatetsf = 0;
1506 memcpy(antdiv->antdiv_bssid, bssid, sizeof(antdiv->antdiv_bssid));
1508 antdiv->antdiv_start = 1;
1511 void ath_slow_ant_div_stop(struct ath_antdiv *antdiv)
1513 antdiv->antdiv_start = 0;
1516 static int32_t ath_find_max_val(int32_t *val,
1517 u8 num_val, u8 *max_index)
1519 u32 MaxVal = *val++;
1523 while (++cur_index < num_val) {
1524 if (*val > MaxVal) {
1526 *max_index = cur_index;
1535 void ath_slow_ant_div(struct ath_antdiv *antdiv,
1536 struct ieee80211_hdr *hdr,
1537 struct ath_rx_status *rx_stats)
1539 struct ath_softc *sc = antdiv->antdiv_sc;
1540 struct ath_hal *ah = sc->sc_ah;
1542 u8 bestcfg, curcfg = antdiv->antdiv_curcfg;
1543 __le16 fc = hdr->frame_control;
1545 if (antdiv->antdiv_start && ieee80211_is_beacon(fc)
1546 && !compare_ether_addr(hdr->addr3, antdiv->antdiv_bssid)) {
1547 antdiv->antdiv_lastbrssi[curcfg] = rx_stats->rs_rssi;
1548 antdiv->antdiv_lastbtsf[curcfg] = ath9k_hw_gettsf64(sc->sc_ah);
1549 curtsf = antdiv->antdiv_lastbtsf[curcfg];
1554 switch (antdiv->antdiv_state) {
1555 case ATH_ANT_DIV_IDLE:
1556 if ((antdiv->antdiv_lastbrssi[curcfg] <
1557 antdiv->antdivf_rssitrig)
1558 && ((curtsf - antdiv->antdiv_laststatetsf) >
1559 ATH_ANT_DIV_MIN_IDLE_US)) {
1562 if (curcfg == antdiv->antdiv_num_antcfg)
1565 if (!ath9k_hw_select_antconfig(ah, curcfg)) {
1566 antdiv->antdiv_bestcfg = antdiv->antdiv_curcfg;
1567 antdiv->antdiv_curcfg = curcfg;
1568 antdiv->antdiv_laststatetsf = curtsf;
1569 antdiv->antdiv_state = ATH_ANT_DIV_SCAN;
1574 case ATH_ANT_DIV_SCAN:
1575 if ((curtsf - antdiv->antdiv_laststatetsf) <
1576 ATH_ANT_DIV_MIN_SCAN_US)
1580 if (curcfg == antdiv->antdiv_num_antcfg)
1583 if (curcfg == antdiv->antdiv_bestcfg) {
1584 ath_find_max_val(antdiv->antdiv_lastbrssi,
1585 antdiv->antdiv_num_antcfg, &bestcfg);
1586 if (!ath9k_hw_select_antconfig(ah, bestcfg)) {
1587 antdiv->antdiv_bestcfg = bestcfg;
1588 antdiv->antdiv_curcfg = bestcfg;
1589 antdiv->antdiv_laststatetsf = curtsf;
1590 antdiv->antdiv_state = ATH_ANT_DIV_IDLE;
1593 if (!ath9k_hw_select_antconfig(ah, curcfg)) {
1594 antdiv->antdiv_curcfg = curcfg;
1595 antdiv->antdiv_laststatetsf = curtsf;
1596 antdiv->antdiv_state = ATH_ANT_DIV_SCAN;
1604 /***********************/
1605 /* Descriptor Handling */
1606 /***********************/
1609 * Set up DMA descriptors
1611 * This function will allocate both the DMA descriptor structure, and the
1612 * buffers it contains. These are used to contain the descriptors used
1616 int ath_descdma_setup(struct ath_softc *sc,
1617 struct ath_descdma *dd,
1618 struct list_head *head,
1623 #define DS2PHYS(_dd, _ds) \
1624 ((_dd)->dd_desc_paddr + ((caddr_t)(_ds) - (caddr_t)(_dd)->dd_desc))
1625 #define ATH_DESC_4KB_BOUND_CHECK(_daddr) ((((_daddr) & 0xFFF) > 0xF7F) ? 1 : 0)
1626 #define ATH_DESC_4KB_BOUND_NUM_SKIPPED(_len) ((_len) / 4096)
1628 struct ath_desc *ds;
1630 int i, bsize, error;
1632 DPRINTF(sc, ATH_DBG_CONFIG, "%s: %s DMA: %u buffers %u desc/buf\n",
1633 __func__, name, nbuf, ndesc);
1635 /* ath_desc must be a multiple of DWORDs */
1636 if ((sizeof(struct ath_desc) % 4) != 0) {
1637 DPRINTF(sc, ATH_DBG_FATAL, "%s: ath_desc not DWORD aligned\n",
1639 ASSERT((sizeof(struct ath_desc) % 4) == 0);
1645 dd->dd_desc_len = sizeof(struct ath_desc) * nbuf * ndesc;
1648 * Need additional DMA memory because we can't use
1649 * descriptors that cross the 4K page boundary. Assume
1650 * one skipped descriptor per 4K page.
1652 if (!(sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_4KB_SPLITTRANS)) {
1654 ATH_DESC_4KB_BOUND_NUM_SKIPPED(dd->dd_desc_len);
1657 while (ndesc_skipped) {
1658 dma_len = ndesc_skipped * sizeof(struct ath_desc);
1659 dd->dd_desc_len += dma_len;
1661 ndesc_skipped = ATH_DESC_4KB_BOUND_NUM_SKIPPED(dma_len);
1665 /* allocate descriptors */
1666 dd->dd_desc = pci_alloc_consistent(sc->pdev,
1668 &dd->dd_desc_paddr);
1669 if (dd->dd_desc == NULL) {
1674 DPRINTF(sc, ATH_DBG_CONFIG, "%s: %s DMA map: %p (%u) -> %llx (%u)\n",
1675 __func__, dd->dd_name, ds, (u32) dd->dd_desc_len,
1676 ito64(dd->dd_desc_paddr), /*XXX*/(u32) dd->dd_desc_len);
1678 /* allocate buffers */
1679 bsize = sizeof(struct ath_buf) * nbuf;
1680 bf = kmalloc(bsize, GFP_KERNEL);
1688 INIT_LIST_HEAD(head);
1689 for (i = 0; i < nbuf; i++, bf++, ds += ndesc) {
1691 bf->bf_daddr = DS2PHYS(dd, ds);
1693 if (!(sc->sc_ah->ah_caps.hw_caps &
1694 ATH9K_HW_CAP_4KB_SPLITTRANS)) {
1696 * Skip descriptor addresses which can cause 4KB
1697 * boundary crossing (addr + length) with a 32 dword
1700 while (ATH_DESC_4KB_BOUND_CHECK(bf->bf_daddr)) {
1701 ASSERT((caddr_t) bf->bf_desc <
1702 ((caddr_t) dd->dd_desc +
1707 bf->bf_daddr = DS2PHYS(dd, ds);
1710 list_add_tail(&bf->list, head);
1714 pci_free_consistent(sc->pdev,
1715 dd->dd_desc_len, dd->dd_desc, dd->dd_desc_paddr);
1717 memzero(dd, sizeof(*dd));
1719 #undef ATH_DESC_4KB_BOUND_CHECK
1720 #undef ATH_DESC_4KB_BOUND_NUM_SKIPPED
1725 * Cleanup DMA descriptors
1727 * This function will free the DMA block that was allocated for the descriptor
1728 * pool. Since this was allocated as one "chunk", it is freed in the same
1732 void ath_descdma_cleanup(struct ath_softc *sc,
1733 struct ath_descdma *dd,
1734 struct list_head *head)
1736 /* Free memory associated with descriptors */
1737 pci_free_consistent(sc->pdev,
1738 dd->dd_desc_len, dd->dd_desc, dd->dd_desc_paddr);
1740 INIT_LIST_HEAD(head);
1741 kfree(dd->dd_bufptr);
1742 memzero(dd, sizeof(*dd));
1749 int ath_get_hal_qnum(u16 queue, struct ath_softc *sc)
1755 qnum = sc->sc_haltype2q[ATH9K_WME_AC_VO];
1758 qnum = sc->sc_haltype2q[ATH9K_WME_AC_VI];
1761 qnum = sc->sc_haltype2q[ATH9K_WME_AC_BE];
1764 qnum = sc->sc_haltype2q[ATH9K_WME_AC_BK];
1767 qnum = sc->sc_haltype2q[ATH9K_WME_AC_BE];
1774 int ath_get_mac80211_qnum(u32 queue, struct ath_softc *sc)
1779 case ATH9K_WME_AC_VO:
1782 case ATH9K_WME_AC_VI:
1785 case ATH9K_WME_AC_BE:
1788 case ATH9K_WME_AC_BK:
1801 * Expand time stamp to TSF
1803 * Extend 15-bit time stamp from rx descriptor to
1804 * a full 64-bit TSF using the current h/w TSF.
1807 u64 ath_extend_tsf(struct ath_softc *sc, u32 rstamp)
1811 tsf = ath9k_hw_gettsf64(sc->sc_ah);
1812 if ((tsf & 0x7fff) < rstamp)
1814 return (tsf & ~0x7fff) | rstamp;
1818 * Set Default Antenna
1820 * Call into the HAL to set the default antenna to use. Not really valid for
1824 void ath_setdefantenna(void *context, u32 antenna)
1826 struct ath_softc *sc = (struct ath_softc *)context;
1827 struct ath_hal *ah = sc->sc_ah;
1829 /* XXX block beacon interrupts */
1830 ath9k_hw_setantenna(ah, antenna);
1831 sc->sc_defant = antenna;
1832 sc->sc_rxotherant = 0;
1838 * This will wake up the chip if required, and set the slot time for the
1839 * frame (maximum transmit time). Slot time is assumed to be already set
1840 * in the ATH object member sc_slottime
1843 void ath_setslottime(struct ath_softc *sc)
1845 ath9k_hw_setslottime(sc->sc_ah, sc->sc_slottime);
1846 sc->sc_updateslot = OK;