/* * Copyright (c) 2008-2009 Atheros Communications Inc. * * Permission to use, copy, modify, and/or distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include #include #include "ath9k.h" #include "btcoex.h" static u8 parse_mpdudensity(u8 mpdudensity) { /* * 802.11n D2.0 defined values for "Minimum MPDU Start Spacing": * 0 for no restriction * 1 for 1/4 us * 2 for 1/2 us * 3 for 1 us * 4 for 2 us * 5 for 4 us * 6 for 8 us * 7 for 16 us */ switch (mpdudensity) { case 0: return 0; case 1: case 2: case 3: /* Our lower layer calculations limit our precision to 1 microsecond */ return 1; case 4: return 2; case 5: return 4; case 6: return 8; case 7: return 16; default: return 0; } } static bool ath9k_has_pending_frames(struct ath_softc *sc, struct ath_txq *txq) { bool pending = false; spin_lock_bh(&txq->axq_lock); if (txq->axq_depth || !list_empty(&txq->axq_acq)) pending = true; else if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) pending = !list_empty(&txq->txq_fifo_pending); spin_unlock_bh(&txq->axq_lock); return pending; } bool ath9k_setpower(struct ath_softc *sc, enum ath9k_power_mode mode) { unsigned long flags; bool ret; spin_lock_irqsave(&sc->sc_pm_lock, flags); ret = ath9k_hw_setpower(sc->sc_ah, mode); spin_unlock_irqrestore(&sc->sc_pm_lock, flags); return ret; } void ath9k_ps_wakeup(struct ath_softc *sc) { struct ath_common *common = ath9k_hw_common(sc->sc_ah); unsigned long flags; enum ath9k_power_mode power_mode; spin_lock_irqsave(&sc->sc_pm_lock, flags); if (++sc->ps_usecount != 1) goto unlock; power_mode = sc->sc_ah->power_mode; ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_AWAKE); /* * While the hardware is asleep, the cycle counters contain no * useful data. Better clear them now so that they don't mess up * survey data results. */ if (power_mode != ATH9K_PM_AWAKE) { spin_lock(&common->cc_lock); ath_hw_cycle_counters_update(common); memset(&common->cc_survey, 0, sizeof(common->cc_survey)); spin_unlock(&common->cc_lock); } unlock: spin_unlock_irqrestore(&sc->sc_pm_lock, flags); } void ath9k_ps_restore(struct ath_softc *sc) { struct ath_common *common = ath9k_hw_common(sc->sc_ah); unsigned long flags; spin_lock_irqsave(&sc->sc_pm_lock, flags); if (--sc->ps_usecount != 0) goto unlock; spin_lock(&common->cc_lock); ath_hw_cycle_counters_update(common); spin_unlock(&common->cc_lock); if (sc->ps_idle) ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_FULL_SLEEP); else if (sc->ps_enabled && !(sc->ps_flags & (PS_WAIT_FOR_BEACON | PS_WAIT_FOR_CAB | PS_WAIT_FOR_PSPOLL_DATA | PS_WAIT_FOR_TX_ACK))) ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_NETWORK_SLEEP); unlock: spin_unlock_irqrestore(&sc->sc_pm_lock, flags); } static void ath_start_ani(struct ath_common *common) { struct ath_hw *ah = common->ah; unsigned long timestamp = jiffies_to_msecs(jiffies); struct ath_softc *sc = (struct ath_softc *) common->priv; if (!(sc->sc_flags & SC_OP_ANI_RUN)) return; if (sc->sc_flags & SC_OP_OFFCHANNEL) return; common->ani.longcal_timer = timestamp; common->ani.shortcal_timer = timestamp; common->ani.checkani_timer = timestamp; mod_timer(&common->ani.timer, jiffies + msecs_to_jiffies((u32)ah->config.ani_poll_interval)); } static void ath_update_survey_nf(struct ath_softc *sc, int channel) { struct ath_hw *ah = sc->sc_ah; struct ath9k_channel *chan = &ah->channels[channel]; struct survey_info *survey = &sc->survey[channel]; if (chan->noisefloor) { survey->filled |= SURVEY_INFO_NOISE_DBM; survey->noise = chan->noisefloor; } } /* * Updates the survey statistics and returns the busy time since last * update in %, if the measurement duration was long enough for the * result to be useful, -1 otherwise. */ static int ath_update_survey_stats(struct ath_softc *sc) { struct ath_hw *ah = sc->sc_ah; struct ath_common *common = ath9k_hw_common(ah); int pos = ah->curchan - &ah->channels[0]; struct survey_info *survey = &sc->survey[pos]; struct ath_cycle_counters *cc = &common->cc_survey; unsigned int div = common->clockrate * 1000; int ret = 0; if (!ah->curchan) return -1; if (ah->power_mode == ATH9K_PM_AWAKE) ath_hw_cycle_counters_update(common); if (cc->cycles > 0) { survey->filled |= SURVEY_INFO_CHANNEL_TIME | SURVEY_INFO_CHANNEL_TIME_BUSY | SURVEY_INFO_CHANNEL_TIME_RX | SURVEY_INFO_CHANNEL_TIME_TX; survey->channel_time += cc->cycles / div; survey->channel_time_busy += cc->rx_busy / div; survey->channel_time_rx += cc->rx_frame / div; survey->channel_time_tx += cc->tx_frame / div; } if (cc->cycles < div) return -1; if (cc->cycles > 0) ret = cc->rx_busy * 100 / cc->cycles; memset(cc, 0, sizeof(*cc)); ath_update_survey_nf(sc, pos); return ret; } /* * Set/change channels. If the channel is really being changed, it's done * by reseting the chip. To accomplish this we must first cleanup any pending * DMA, then restart stuff. */ int ath_set_channel(struct ath_softc *sc, struct ieee80211_hw *hw, struct ath9k_channel *hchan) { struct ath_hw *ah = sc->sc_ah; struct ath_common *common = ath9k_hw_common(ah); struct ieee80211_conf *conf = &common->hw->conf; bool fastcc = true, stopped; struct ieee80211_channel *channel = hw->conf.channel; struct ath9k_hw_cal_data *caldata = NULL; int r; if (sc->sc_flags & SC_OP_INVALID) return -EIO; sc->hw_busy_count = 0; del_timer_sync(&common->ani.timer); cancel_work_sync(&sc->paprd_work); cancel_work_sync(&sc->hw_check_work); cancel_delayed_work_sync(&sc->tx_complete_work); cancel_delayed_work_sync(&sc->hw_pll_work); ath9k_ps_wakeup(sc); spin_lock_bh(&sc->sc_pcu_lock); /* * This is only performed if the channel settings have * actually changed. * * To switch channels clear any pending DMA operations; * wait long enough for the RX fifo to drain, reset the * hardware at the new frequency, and then re-enable * the relevant bits of the h/w. */ ath9k_hw_disable_interrupts(ah); stopped = ath_drain_all_txq(sc, false); if (!ath_stoprecv(sc)) stopped = false; if (!ath9k_hw_check_alive(ah)) stopped = false; /* XXX: do not flush receive queue here. We don't want * to flush data frames already in queue because of * changing channel. */ if (!stopped || !(sc->sc_flags & SC_OP_OFFCHANNEL)) fastcc = false; if (!(sc->sc_flags & SC_OP_OFFCHANNEL)) caldata = &sc->caldata; ath_dbg(common, ATH_DBG_CONFIG, "(%u MHz) -> (%u MHz), conf_is_ht40: %d fastcc: %d\n", sc->sc_ah->curchan->channel, channel->center_freq, conf_is_ht40(conf), fastcc); r = ath9k_hw_reset(ah, hchan, caldata, fastcc); if (r) { ath_err(common, "Unable to reset channel (%u MHz), reset status %d\n", channel->center_freq, r); goto ps_restore; } if (ath_startrecv(sc) != 0) { ath_err(common, "Unable to restart recv logic\n"); r = -EIO; goto ps_restore; } ath9k_cmn_update_txpow(ah, sc->curtxpow, sc->config.txpowlimit, &sc->curtxpow); ath9k_hw_set_interrupts(ah, ah->imask); if (!(sc->sc_flags & (SC_OP_OFFCHANNEL))) { if (sc->sc_flags & SC_OP_BEACONS) ath_beacon_config(sc, NULL); ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0); ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work, HZ/2); ath_start_ani(common); } ps_restore: ieee80211_wake_queues(hw); spin_unlock_bh(&sc->sc_pcu_lock); ath9k_ps_restore(sc); return r; } static void ath_paprd_activate(struct ath_softc *sc) { struct ath_hw *ah = sc->sc_ah; struct ath9k_hw_cal_data *caldata = ah->caldata; struct ath_common *common = ath9k_hw_common(ah); int chain; if (!caldata || !caldata->paprd_done) return; ath9k_ps_wakeup(sc); ar9003_paprd_enable(ah, false); for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) { if (!(common->tx_chainmask & BIT(chain))) continue; ar9003_paprd_populate_single_table(ah, caldata, chain); } ar9003_paprd_enable(ah, true); ath9k_ps_restore(sc); } static bool ath_paprd_send_frame(struct ath_softc *sc, struct sk_buff *skb, int chain) { struct ieee80211_hw *hw = sc->hw; struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); struct ath_hw *ah = sc->sc_ah; struct ath_common *common = ath9k_hw_common(ah); struct ath_tx_control txctl; int time_left; memset(&txctl, 0, sizeof(txctl)); txctl.txq = sc->tx.txq_map[WME_AC_BE]; memset(tx_info, 0, sizeof(*tx_info)); tx_info->band = hw->conf.channel->band; tx_info->flags |= IEEE80211_TX_CTL_NO_ACK; tx_info->control.rates[0].idx = 0; tx_info->control.rates[0].count = 1; tx_info->control.rates[0].flags = IEEE80211_TX_RC_MCS; tx_info->control.rates[1].idx = -1; init_completion(&sc->paprd_complete); txctl.paprd = BIT(chain); if (ath_tx_start(hw, skb, &txctl) != 0) { ath_dbg(common, ATH_DBG_XMIT, "PAPRD TX failed\n"); dev_kfree_skb_any(skb); return false; } time_left = wait_for_completion_timeout(&sc->paprd_complete, msecs_to_jiffies(ATH_PAPRD_TIMEOUT)); if (!time_left) ath_dbg(ath9k_hw_common(sc->sc_ah), ATH_DBG_CALIBRATE, "Timeout waiting for paprd training on TX chain %d\n", chain); return !!time_left; } void ath_paprd_calibrate(struct work_struct *work) { struct ath_softc *sc = container_of(work, struct ath_softc, paprd_work); struct ieee80211_hw *hw = sc->hw; struct ath_hw *ah = sc->sc_ah; struct ieee80211_hdr *hdr; struct sk_buff *skb = NULL; struct ath9k_hw_cal_data *caldata = ah->caldata; struct ath_common *common = ath9k_hw_common(ah); int ftype; int chain_ok = 0; int chain; int len = 1800; if (!caldata) return; if (ar9003_paprd_init_table(ah) < 0) return; skb = alloc_skb(len, GFP_KERNEL); if (!skb) return; skb_put(skb, len); memset(skb->data, 0, len); hdr = (struct ieee80211_hdr *)skb->data; ftype = IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC; hdr->frame_control = cpu_to_le16(ftype); hdr->duration_id = cpu_to_le16(10); memcpy(hdr->addr1, hw->wiphy->perm_addr, ETH_ALEN); memcpy(hdr->addr2, hw->wiphy->perm_addr, ETH_ALEN); memcpy(hdr->addr3, hw->wiphy->perm_addr, ETH_ALEN); ath9k_ps_wakeup(sc); for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) { if (!(common->tx_chainmask & BIT(chain))) continue; chain_ok = 0; ath_dbg(common, ATH_DBG_CALIBRATE, "Sending PAPRD frame for thermal measurement " "on chain %d\n", chain); if (!ath_paprd_send_frame(sc, skb, chain)) goto fail_paprd; ar9003_paprd_setup_gain_table(ah, chain); ath_dbg(common, ATH_DBG_CALIBRATE, "Sending PAPRD training frame on chain %d\n", chain); if (!ath_paprd_send_frame(sc, skb, chain)) goto fail_paprd; if (!ar9003_paprd_is_done(ah)) break; if (ar9003_paprd_create_curve(ah, caldata, chain) != 0) break; chain_ok = 1; } kfree_skb(skb); if (chain_ok) { caldata->paprd_done = true; ath_paprd_activate(sc); } fail_paprd: ath9k_ps_restore(sc); } /* * This routine performs the periodic noise floor calibration function * that is used to adjust and optimize the chip performance. This * takes environmental changes (location, temperature) into account. * When the task is complete, it reschedules itself depending on the * appropriate interval that was calculated. */ void ath_ani_calibrate(unsigned long data) { struct ath_softc *sc = (struct ath_softc *)data; struct ath_hw *ah = sc->sc_ah; struct ath_common *common = ath9k_hw_common(ah); bool longcal = false; bool shortcal = false; bool aniflag = false; unsigned int timestamp = jiffies_to_msecs(jiffies); u32 cal_interval, short_cal_interval, long_cal_interval; unsigned long flags; if (ah->caldata && ah->caldata->nfcal_interference) long_cal_interval = ATH_LONG_CALINTERVAL_INT; else long_cal_interval = ATH_LONG_CALINTERVAL; short_cal_interval = (ah->opmode == NL80211_IFTYPE_AP) ? ATH_AP_SHORT_CALINTERVAL : ATH_STA_SHORT_CALINTERVAL; /* Only calibrate if awake */ if (sc->sc_ah->power_mode != ATH9K_PM_AWAKE) goto set_timer; ath9k_ps_wakeup(sc); /* Long calibration runs independently of short calibration. */ if ((timestamp - common->ani.longcal_timer) >= long_cal_interval) { longcal = true; ath_dbg(common, ATH_DBG_ANI, "longcal @%lu\n", jiffies); common->ani.longcal_timer = timestamp; } /* Short calibration applies only while caldone is false */ if (!common->ani.caldone) { if ((timestamp - common->ani.shortcal_timer) >= short_cal_interval) { shortcal = true; ath_dbg(common, ATH_DBG_ANI, "shortcal @%lu\n", jiffies); common->ani.shortcal_timer = timestamp; common->ani.resetcal_timer = timestamp; } } else { if ((timestamp - common->ani.resetcal_timer) >= ATH_RESTART_CALINTERVAL) { common->ani.caldone = ath9k_hw_reset_calvalid(ah); if (common->ani.caldone) common->ani.resetcal_timer = timestamp; } } /* Verify whether we must check ANI */ if ((timestamp - common->ani.checkani_timer) >= ah->config.ani_poll_interval) { aniflag = true; common->ani.checkani_timer = timestamp; } /* Skip all processing if there's nothing to do. */ if (longcal || shortcal || aniflag) { /* Call ANI routine if necessary */ if (aniflag) { spin_lock_irqsave(&common->cc_lock, flags); ath9k_hw_ani_monitor(ah, ah->curchan); ath_update_survey_stats(sc); spin_unlock_irqrestore(&common->cc_lock, flags); } /* Perform calibration if necessary */ if (longcal || shortcal) { common->ani.caldone = ath9k_hw_calibrate(ah, ah->curchan, common->rx_chainmask, longcal); } } ath9k_ps_restore(sc); set_timer: /* * Set timer interval based on previous results. * The interval must be the shortest necessary to satisfy ANI, * short calibration and long calibration. */ cal_interval = ATH_LONG_CALINTERVAL; if (sc->sc_ah->config.enable_ani) cal_interval = min(cal_interval, (u32)ah->config.ani_poll_interval); if (!common->ani.caldone) cal_interval = min(cal_interval, (u32)short_cal_interval); mod_timer(&common->ani.timer, jiffies + msecs_to_jiffies(cal_interval)); if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_PAPRD) && ah->caldata) { if (!ah->caldata->paprd_done) ieee80211_queue_work(sc->hw, &sc->paprd_work); else if (!ah->paprd_table_write_done) ath_paprd_activate(sc); } } static void ath_node_attach(struct ath_softc *sc, struct ieee80211_sta *sta) { struct ath_node *an; struct ath_hw *ah = sc->sc_ah; an = (struct ath_node *)sta->drv_priv; #ifdef CONFIG_ATH9K_DEBUGFS spin_lock(&sc->nodes_lock); list_add(&an->list, &sc->nodes); spin_unlock(&sc->nodes_lock); an->sta = sta; #endif if ((ah->caps.hw_caps) & ATH9K_HW_CAP_APM) sc->sc_flags |= SC_OP_ENABLE_APM; if (sc->sc_flags & SC_OP_TXAGGR) { ath_tx_node_init(sc, an); an->maxampdu = 1 << (IEEE80211_HT_MAX_AMPDU_FACTOR + sta->ht_cap.ampdu_factor); an->mpdudensity = parse_mpdudensity(sta->ht_cap.ampdu_density); } } static void ath_node_detach(struct ath_softc *sc, struct ieee80211_sta *sta) { struct ath_node *an = (struct ath_node *)sta->drv_priv; #ifdef CONFIG_ATH9K_DEBUGFS spin_lock(&sc->nodes_lock); list_del(&an->list); spin_unlock(&sc->nodes_lock); an->sta = NULL; #endif if (sc->sc_flags & SC_OP_TXAGGR) ath_tx_node_cleanup(sc, an); } void ath_hw_check(struct work_struct *work) { struct ath_softc *sc = container_of(work, struct ath_softc, hw_check_work); struct ath_common *common = ath9k_hw_common(sc->sc_ah); unsigned long flags; int busy; ath9k_ps_wakeup(sc); if (ath9k_hw_check_alive(sc->sc_ah)) goto out; spin_lock_irqsave(&common->cc_lock, flags); busy = ath_update_survey_stats(sc); spin_unlock_irqrestore(&common->cc_lock, flags); ath_dbg(common, ATH_DBG_RESET, "Possible baseband hang, " "busy=%d (try %d)\n", busy, sc->hw_busy_count + 1); if (busy >= 99) { if (++sc->hw_busy_count >= 3) ath_reset(sc, true); } else if (busy >= 0) sc->hw_busy_count = 0; out: ath9k_ps_restore(sc); } void ath9k_tasklet(unsigned long data) { struct ath_softc *sc = (struct ath_softc *)data; struct ath_hw *ah = sc->sc_ah; struct ath_common *common = ath9k_hw_common(ah); u32 status = sc->intrstatus; u32 rxmask; if (status & ATH9K_INT_FATAL) { ath_reset(sc, true); return; } ath9k_ps_wakeup(sc); spin_lock(&sc->sc_pcu_lock); /* * Only run the baseband hang check if beacons stop working in AP or * IBSS mode, because it has a high false positive rate. For station * mode it should not be necessary, since the upper layers will detect * this through a beacon miss automatically and the following channel * change will trigger a hardware reset anyway */ if (ath9k_hw_numtxpending(ah, sc->beacon.beaconq) != 0 && !ath9k_hw_check_alive(ah)) ieee80211_queue_work(sc->hw, &sc->hw_check_work); if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) rxmask = (ATH9K_INT_RXHP | ATH9K_INT_RXLP | ATH9K_INT_RXEOL | ATH9K_INT_RXORN); else rxmask = (ATH9K_INT_RX | ATH9K_INT_RXEOL | ATH9K_INT_RXORN); if (status & rxmask) { /* Check for high priority Rx first */ if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) && (status & ATH9K_INT_RXHP)) ath_rx_tasklet(sc, 0, true); ath_rx_tasklet(sc, 0, false); } if (status & ATH9K_INT_TX) { if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) ath_tx_edma_tasklet(sc); else ath_tx_tasklet(sc); } if ((status & ATH9K_INT_TSFOOR) && sc->ps_enabled) { /* * TSF sync does not look correct; remain awake to sync with * the next Beacon. */ ath_dbg(common, ATH_DBG_PS, "TSFOOR - Sync with next Beacon\n"); sc->ps_flags |= PS_WAIT_FOR_BEACON | PS_BEACON_SYNC; } if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE) if (status & ATH9K_INT_GENTIMER) ath_gen_timer_isr(sc->sc_ah); /* re-enable hardware interrupt */ ath9k_hw_enable_interrupts(ah); spin_unlock(&sc->sc_pcu_lock); ath9k_ps_restore(sc); } irqreturn_t ath_isr(int irq, void *dev) { #define SCHED_INTR ( \ ATH9K_INT_FATAL | \ ATH9K_INT_RXORN | \ ATH9K_INT_RXEOL | \ ATH9K_INT_RX | \ ATH9K_INT_RXLP | \ ATH9K_INT_RXHP | \ ATH9K_INT_TX | \ ATH9K_INT_BMISS | \ ATH9K_INT_CST | \ ATH9K_INT_TSFOOR | \ ATH9K_INT_GENTIMER) struct ath_softc *sc = dev; struct ath_hw *ah = sc->sc_ah; struct ath_common *common = ath9k_hw_common(ah); enum ath9k_int status; bool sched = false; /* * The hardware is not ready/present, don't * touch anything. Note this can happen early * on if the IRQ is shared. */ if (sc->sc_flags & SC_OP_INVALID) return IRQ_NONE; /* shared irq, not for us */ if (!ath9k_hw_intrpend(ah)) return IRQ_NONE; /* * Figure out the reason(s) for the interrupt. Note * that the hal returns a pseudo-ISR that may include * bits we haven't explicitly enabled so we mask the * value to insure we only process bits we requested. */ ath9k_hw_getisr(ah, &status); /* NB: clears ISR too */ status &= ah->imask; /* discard unasked-for bits */ /* * If there are no status bits set, then this interrupt was not * for me (should have been caught above). */ if (!status) return IRQ_NONE; /* Cache the status */ sc->intrstatus = status; if (status & SCHED_INTR) sched = true; /* * If a FATAL or RXORN interrupt is received, we have to reset the * chip immediately. */ if ((status & ATH9K_INT_FATAL) || ((status & ATH9K_INT_RXORN) && !(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA))) goto chip_reset; if ((ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) && (status & ATH9K_INT_BB_WATCHDOG)) { spin_lock(&common->cc_lock); ath_hw_cycle_counters_update(common); ar9003_hw_bb_watchdog_dbg_info(ah); spin_unlock(&common->cc_lock); goto chip_reset; } if (status & ATH9K_INT_SWBA) tasklet_schedule(&sc->bcon_tasklet); if (status & ATH9K_INT_TXURN) ath9k_hw_updatetxtriglevel(ah, true); if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) { if (status & ATH9K_INT_RXEOL) { ah->imask &= ~(ATH9K_INT_RXEOL | ATH9K_INT_RXORN); ath9k_hw_set_interrupts(ah, ah->imask); } } if (status & ATH9K_INT_MIB) { /* * Disable interrupts until we service the MIB * interrupt; otherwise it will continue to * fire. */ ath9k_hw_disable_interrupts(ah); /* * Let the hal handle the event. We assume * it will clear whatever condition caused * the interrupt. */ spin_lock(&common->cc_lock); ath9k_hw_proc_mib_event(ah); spin_unlock(&common->cc_lock); ath9k_hw_enable_interrupts(ah); } if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) if (status & ATH9K_INT_TIM_TIMER) { if (ATH_DBG_WARN_ON_ONCE(sc->ps_idle)) goto chip_reset; /* Clear RxAbort bit so that we can * receive frames */ ath9k_setpower(sc, ATH9K_PM_AWAKE); ath9k_hw_setrxabort(sc->sc_ah, 0); sc->ps_flags |= PS_WAIT_FOR_BEACON; } chip_reset: ath_debug_stat_interrupt(sc, status); if (sched) { /* turn off every interrupt */ ath9k_hw_disable_interrupts(ah); tasklet_schedule(&sc->intr_tq); } return IRQ_HANDLED; #undef SCHED_INTR } static void ath9k_bss_assoc_info(struct ath_softc *sc, struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_bss_conf *bss_conf) { struct ath_hw *ah = sc->sc_ah; struct ath_common *common = ath9k_hw_common(ah); if (bss_conf->assoc) { ath_dbg(common, ATH_DBG_CONFIG, "Bss Info ASSOC %d, bssid: %pM\n", bss_conf->aid, common->curbssid); /* New association, store aid */ common->curaid = bss_conf->aid; ath9k_hw_write_associd(ah); /* * Request a re-configuration of Beacon related timers * on the receipt of the first Beacon frame (i.e., * after time sync with the AP). */ sc->ps_flags |= PS_BEACON_SYNC; /* Configure the beacon */ ath_beacon_config(sc, vif); /* Reset rssi stats */ sc->last_rssi = ATH_RSSI_DUMMY_MARKER; sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER; sc->sc_flags |= SC_OP_ANI_RUN; ath_start_ani(common); } else { ath_dbg(common, ATH_DBG_CONFIG, "Bss Info DISASSOC\n"); common->curaid = 0; /* Stop ANI */ sc->sc_flags &= ~SC_OP_ANI_RUN; del_timer_sync(&common->ani.timer); } } void ath_radio_enable(struct ath_softc *sc, struct ieee80211_hw *hw) { struct ath_hw *ah = sc->sc_ah; struct ath_common *common = ath9k_hw_common(ah); struct ieee80211_channel *channel = hw->conf.channel; int r; ath9k_ps_wakeup(sc); spin_lock_bh(&sc->sc_pcu_lock); ath9k_hw_configpcipowersave(ah, 0, 0); if (!ah->curchan) ah->curchan = ath9k_cmn_get_curchannel(sc->hw, ah); r = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false); if (r) { ath_err(common, "Unable to reset channel (%u MHz), reset status %d\n", channel->center_freq, r); } ath9k_cmn_update_txpow(ah, sc->curtxpow, sc->config.txpowlimit, &sc->curtxpow); if (ath_startrecv(sc) != 0) { ath_err(common, "Unable to restart recv logic\n"); goto out; } if (sc->sc_flags & SC_OP_BEACONS) ath_beacon_config(sc, NULL); /* restart beacons */ /* Re-Enable interrupts */ ath9k_hw_set_interrupts(ah, ah->imask); /* Enable LED */ ath9k_hw_cfg_output(ah, ah->led_pin, AR_GPIO_OUTPUT_MUX_AS_OUTPUT); ath9k_hw_set_gpio(ah, ah->led_pin, 0); ieee80211_wake_queues(hw); ieee80211_queue_delayed_work(hw, &sc->hw_pll_work, HZ/2); out: spin_unlock_bh(&sc->sc_pcu_lock); ath9k_ps_restore(sc); } void ath_radio_disable(struct ath_softc *sc, struct ieee80211_hw *hw) { struct ath_hw *ah = sc->sc_ah; struct ieee80211_channel *channel = hw->conf.channel; int r; ath9k_ps_wakeup(sc); cancel_delayed_work_sync(&sc->hw_pll_work); spin_lock_bh(&sc->sc_pcu_lock); ieee80211_stop_queues(hw); /* * Keep the LED on when the radio is disabled * during idle unassociated state. */ if (!sc->ps_idle) { ath9k_hw_set_gpio(ah, ah->led_pin, 1); ath9k_hw_cfg_gpio_input(ah, ah->led_pin); } /* Disable interrupts */ ath9k_hw_disable_interrupts(ah); ath_drain_all_txq(sc, false); /* clear pending tx frames */ ath_stoprecv(sc); /* turn off frame recv */ ath_flushrecv(sc); /* flush recv queue */ if (!ah->curchan) ah->curchan = ath9k_cmn_get_curchannel(hw, ah); r = ath9k_hw_reset(ah, ah->curchan, ah->caldata, false); if (r) { ath_err(ath9k_hw_common(sc->sc_ah), "Unable to reset channel (%u MHz), reset status %d\n", channel->center_freq, r); } ath9k_hw_phy_disable(ah); ath9k_hw_configpcipowersave(ah, 1, 1); spin_unlock_bh(&sc->sc_pcu_lock); ath9k_ps_restore(sc); } int ath_reset(struct ath_softc *sc, bool retry_tx) { struct ath_hw *ah = sc->sc_ah; struct ath_common *common = ath9k_hw_common(ah); struct ieee80211_hw *hw = sc->hw; int r; sc->hw_busy_count = 0; /* Stop ANI */ del_timer_sync(&common->ani.timer); ath9k_ps_wakeup(sc); spin_lock_bh(&sc->sc_pcu_lock); ieee80211_stop_queues(hw); ath9k_hw_disable_interrupts(ah); ath_drain_all_txq(sc, retry_tx); ath_stoprecv(sc); ath_flushrecv(sc); r = ath9k_hw_reset(ah, sc->sc_ah->curchan, ah->caldata, false); if (r) ath_err(common, "Unable to reset hardware; reset status %d\n", r); if (ath_startrecv(sc) != 0) ath_err(common, "Unable to start recv logic\n"); /* * We may be doing a reset in response to a request * that changes the channel so update any state that * might change as a result. */ ath9k_cmn_update_txpow(ah, sc->curtxpow, sc->config.txpowlimit, &sc->curtxpow); if ((sc->sc_flags & SC_OP_BEACONS) || !(sc->sc_flags & (SC_OP_OFFCHANNEL))) ath_beacon_config(sc, NULL); /* restart beacons */ ath9k_hw_set_interrupts(ah, ah->imask); if (retry_tx) { int i; for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) { if (ATH_TXQ_SETUP(sc, i)) { spin_lock_bh(&sc->tx.txq[i].axq_lock); ath_txq_schedule(sc, &sc->tx.txq[i]); spin_unlock_bh(&sc->tx.txq[i].axq_lock); } } } ieee80211_wake_queues(hw); spin_unlock_bh(&sc->sc_pcu_lock); /* Start ANI */ ath_start_ani(common); ath9k_ps_restore(sc); return r; } /**********************/ /* mac80211 callbacks */ /**********************/ static int ath9k_start(struct ieee80211_hw *hw) { struct ath_softc *sc = hw->priv; struct ath_hw *ah = sc->sc_ah; struct ath_common *common = ath9k_hw_common(ah); struct ieee80211_channel *curchan = hw->conf.channel; struct ath9k_channel *init_channel; int r; ath_dbg(common, ATH_DBG_CONFIG, "Starting driver with initial channel: %d MHz\n", curchan->center_freq); ath9k_ps_wakeup(sc); mutex_lock(&sc->mutex); /* setup initial channel */ sc->chan_idx = curchan->hw_value; init_channel = ath9k_cmn_get_curchannel(hw, ah); /* Reset SERDES registers */ ath9k_hw_configpcipowersave(ah, 0, 0); /* * The basic interface to setting the hardware in a good * state is ``reset''. On return the hardware is known to * be powered up and with interrupts disabled. This must * be followed by initialization of the appropriate bits * and then setup of the interrupt mask. */ spin_lock_bh(&sc->sc_pcu_lock); r = ath9k_hw_reset(ah, init_channel, ah->caldata, false); if (r) { ath_err(common, "Unable to reset hardware; reset status %d (freq %u MHz)\n", r, curchan->center_freq); spin_unlock_bh(&sc->sc_pcu_lock); goto mutex_unlock; } /* * This is needed only to setup initial state * but it's best done after a reset. */ ath9k_cmn_update_txpow(ah, sc->curtxpow, sc->config.txpowlimit, &sc->curtxpow); /* * Setup the hardware after reset: * The receive engine is set going. * Frame transmit is handled entirely * in the frame output path; there's nothing to do * here except setup the interrupt mask. */ if (ath_startrecv(sc) != 0) { ath_err(common, "Unable to start recv logic\n"); r = -EIO; spin_unlock_bh(&sc->sc_pcu_lock); goto mutex_unlock; } spin_unlock_bh(&sc->sc_pcu_lock); /* Setup our intr mask. */ ah->imask = ATH9K_INT_TX | ATH9K_INT_RXEOL | ATH9K_INT_RXORN | ATH9K_INT_FATAL | ATH9K_INT_GLOBAL; if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) ah->imask |= ATH9K_INT_RXHP | ATH9K_INT_RXLP | ATH9K_INT_BB_WATCHDOG; else ah->imask |= ATH9K_INT_RX; ah->imask |= ATH9K_INT_GTT; if (ah->caps.hw_caps & ATH9K_HW_CAP_HT) ah->imask |= ATH9K_INT_CST; sc->sc_flags &= ~SC_OP_INVALID; sc->sc_ah->is_monitoring = false; /* Disable BMISS interrupt when we're not associated */ ah->imask &= ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS); ath9k_hw_set_interrupts(ah, ah->imask); ieee80211_wake_queues(hw); ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0); if ((ah->btcoex_hw.scheme != ATH_BTCOEX_CFG_NONE) && !ah->btcoex_hw.enabled) { ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT, AR_STOMP_LOW_WLAN_WGHT); ath9k_hw_btcoex_enable(ah); if (common->bus_ops->bt_coex_prep) common->bus_ops->bt_coex_prep(common); if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE) ath9k_btcoex_timer_resume(sc); } if (ah->caps.pcie_lcr_extsync_en && common->bus_ops->extn_synch_en) common->bus_ops->extn_synch_en(common); mutex_unlock: mutex_unlock(&sc->mutex); ath9k_ps_restore(sc); return r; } static void ath9k_tx(struct ieee80211_hw *hw, struct sk_buff *skb) { struct ath_softc *sc = hw->priv; struct ath_common *common = ath9k_hw_common(sc->sc_ah); struct ath_tx_control txctl; struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; if (sc->ps_enabled) { /* * mac80211 does not set PM field for normal data frames, so we * need to update that based on the current PS mode. */ if (ieee80211_is_data(hdr->frame_control) && !ieee80211_is_nullfunc(hdr->frame_control) && !ieee80211_has_pm(hdr->frame_control)) { ath_dbg(common, ATH_DBG_PS, "Add PM=1 for a TX frame while in PS mode\n"); hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); } } if (unlikely(sc->sc_ah->power_mode != ATH9K_PM_AWAKE)) { /* * We are using PS-Poll and mac80211 can request TX while in * power save mode. Need to wake up hardware for the TX to be * completed and if needed, also for RX of buffered frames. */ ath9k_ps_wakeup(sc); if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) ath9k_hw_setrxabort(sc->sc_ah, 0); if (ieee80211_is_pspoll(hdr->frame_control)) { ath_dbg(common, ATH_DBG_PS, "Sending PS-Poll to pick a buffered frame\n"); sc->ps_flags |= PS_WAIT_FOR_PSPOLL_DATA; } else { ath_dbg(common, ATH_DBG_PS, "Wake up to complete TX\n"); sc->ps_flags |= PS_WAIT_FOR_TX_ACK; } /* * The actual restore operation will happen only after * the sc_flags bit is cleared. We are just dropping * the ps_usecount here. */ ath9k_ps_restore(sc); } memset(&txctl, 0, sizeof(struct ath_tx_control)); txctl.txq = sc->tx.txq_map[skb_get_queue_mapping(skb)]; ath_dbg(common, ATH_DBG_XMIT, "transmitting packet, skb: %p\n", skb); if (ath_tx_start(hw, skb, &txctl) != 0) { ath_dbg(common, ATH_DBG_XMIT, "TX failed\n"); goto exit; } return; exit: dev_kfree_skb_any(skb); } static void ath9k_stop(struct ieee80211_hw *hw) { struct ath_softc *sc = hw->priv; struct ath_hw *ah = sc->sc_ah; struct ath_common *common = ath9k_hw_common(ah); mutex_lock(&sc->mutex); cancel_delayed_work_sync(&sc->tx_complete_work); cancel_delayed_work_sync(&sc->hw_pll_work); cancel_work_sync(&sc->paprd_work); cancel_work_sync(&sc->hw_check_work); if (sc->sc_flags & SC_OP_INVALID) { ath_dbg(common, ATH_DBG_ANY, "Device not present\n"); mutex_unlock(&sc->mutex); return; } /* Ensure HW is awake when we try to shut it down. */ ath9k_ps_wakeup(sc); if (ah->btcoex_hw.enabled) { ath9k_hw_btcoex_disable(ah); if (ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE) ath9k_btcoex_timer_pause(sc); } spin_lock_bh(&sc->sc_pcu_lock); /* prevent tasklets to enable interrupts once we disable them */ ah->imask &= ~ATH9K_INT_GLOBAL; /* make sure h/w will not generate any interrupt * before setting the invalid flag. */ ath9k_hw_disable_interrupts(ah); if (!(sc->sc_flags & SC_OP_INVALID)) { ath_drain_all_txq(sc, false); ath_stoprecv(sc); ath9k_hw_phy_disable(ah); } else sc->rx.rxlink = NULL; if (sc->rx.frag) { dev_kfree_skb_any(sc->rx.frag); sc->rx.frag = NULL; } /* disable HAL and put h/w to sleep */ ath9k_hw_disable(ah); ath9k_hw_configpcipowersave(ah, 1, 1); spin_unlock_bh(&sc->sc_pcu_lock); /* we can now sync irq and kill any running tasklets, since we already * disabled interrupts and not holding a spin lock */ synchronize_irq(sc->irq); tasklet_kill(&sc->intr_tq); tasklet_kill(&sc->bcon_tasklet); ath9k_ps_restore(sc); sc->ps_idle = true; ath_radio_disable(sc, hw); sc->sc_flags |= SC_OP_INVALID; mutex_unlock(&sc->mutex); ath_dbg(common, ATH_DBG_CONFIG, "Driver halt\n"); } bool ath9k_uses_beacons(int type) { switch (type) { case NL80211_IFTYPE_AP: case NL80211_IFTYPE_ADHOC: case NL80211_IFTYPE_MESH_POINT: return true; default: return false; } } static void ath9k_reclaim_beacon(struct ath_softc *sc, struct ieee80211_vif *vif) { struct ath_vif *avp = (void *)vif->drv_priv; ath9k_set_beaconing_status(sc, false); ath_beacon_return(sc, avp); ath9k_set_beaconing_status(sc, true); sc->sc_flags &= ~SC_OP_BEACONS; } static void ath9k_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif) { struct ath9k_vif_iter_data *iter_data = data; int i; if (iter_data->hw_macaddr) for (i = 0; i < ETH_ALEN; i++) iter_data->mask[i] &= ~(iter_data->hw_macaddr[i] ^ mac[i]); switch (vif->type) { case NL80211_IFTYPE_AP: iter_data->naps++; break; case NL80211_IFTYPE_STATION: iter_data->nstations++; break; case NL80211_IFTYPE_ADHOC: iter_data->nadhocs++; break; case NL80211_IFTYPE_MESH_POINT: iter_data->nmeshes++; break; case NL80211_IFTYPE_WDS: iter_data->nwds++; break; default: iter_data->nothers++; break; } } /* Called with sc->mutex held. */ void ath9k_calculate_iter_data(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ath9k_vif_iter_data *iter_data) { struct ath_softc *sc = hw->priv; struct ath_hw *ah = sc->sc_ah; struct ath_common *common = ath9k_hw_common(ah); /* * Use the hardware MAC address as reference, the hardware uses it * together with the BSSID mask when matching addresses. */ memset(iter_data, 0, sizeof(*iter_data)); iter_data->hw_macaddr = common->macaddr; memset(&iter_data->mask, 0xff, ETH_ALEN); if (vif) ath9k_vif_iter(iter_data, vif->addr, vif); /* Get list of all active MAC addresses */ ieee80211_iterate_active_interfaces_atomic(sc->hw, ath9k_vif_iter, iter_data); } /* Called with sc->mutex held. */ static void ath9k_calculate_summary_state(struct ieee80211_hw *hw, struct ieee80211_vif *vif) { struct ath_softc *sc = hw->priv; struct ath_hw *ah = sc->sc_ah; struct ath_common *common = ath9k_hw_common(ah); struct ath9k_vif_iter_data iter_data; ath9k_calculate_iter_data(hw, vif, &iter_data); ath9k_ps_wakeup(sc); /* Set BSSID mask. */ memcpy(common->bssidmask, iter_data.mask, ETH_ALEN); ath_hw_setbssidmask(common); /* Set op-mode & TSF */ if (iter_data.naps > 0) { ath9k_hw_set_tsfadjust(ah, 1); sc->sc_flags |= SC_OP_TSF_RESET; ah->opmode = NL80211_IFTYPE_AP; } else { ath9k_hw_set_tsfadjust(ah, 0); sc->sc_flags &= ~SC_OP_TSF_RESET; if (iter_data.nwds + iter_data.nmeshes) ah->opmode = NL80211_IFTYPE_AP; else if (iter_data.nadhocs) ah->opmode = NL80211_IFTYPE_ADHOC; else ah->opmode = NL80211_IFTYPE_STATION; } /* * Enable MIB interrupts when there are hardware phy counters. */ if ((iter_data.nstations + iter_data.nadhocs + iter_data.nmeshes) > 0) { if (ah->config.enable_ani) ah->imask |= ATH9K_INT_MIB; ah->imask |= ATH9K_INT_TSFOOR; } else { ah->imask &= ~ATH9K_INT_MIB; ah->imask &= ~ATH9K_INT_TSFOOR; } ath9k_hw_set_interrupts(ah, ah->imask); ath9k_ps_restore(sc); /* Set up ANI */ if ((iter_data.naps + iter_data.nadhocs) > 0) { sc->sc_flags |= SC_OP_ANI_RUN; ath_start_ani(common); } else { sc->sc_flags &= ~SC_OP_ANI_RUN; del_timer_sync(&common->ani.timer); } } /* Called with sc->mutex held, vif counts set up properly. */ static void ath9k_do_vif_add_setup(struct ieee80211_hw *hw, struct ieee80211_vif *vif) { struct ath_softc *sc = hw->priv; ath9k_calculate_summary_state(hw, vif); if (ath9k_uses_beacons(vif->type)) { int error; /* This may fail because upper levels do not have beacons * properly configured yet. That's OK, we assume it * will be properly configured and then we will be notified * in the info_changed method and set up beacons properly * there. */ ath9k_set_beaconing_status(sc, false); error = ath_beacon_alloc(sc, vif); if (!error) ath_beacon_config(sc, vif); ath9k_set_beaconing_status(sc, true); } } static int ath9k_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif) { struct ath_softc *sc = hw->priv; struct ath_hw *ah = sc->sc_ah; struct ath_common *common = ath9k_hw_common(ah); struct ath_vif *avp = (void *)vif->drv_priv; int ret = 0; mutex_lock(&sc->mutex); switch (vif->type) { case NL80211_IFTYPE_STATION: case NL80211_IFTYPE_WDS: case NL80211_IFTYPE_ADHOC: case NL80211_IFTYPE_AP: case NL80211_IFTYPE_MESH_POINT: break; default: ath_err(common, "Interface type %d not yet supported\n", vif->type); ret = -EOPNOTSUPP; goto out; } if (ath9k_uses_beacons(vif->type)) { if (sc->nbcnvifs >= ATH_BCBUF) { ath_err(common, "Not enough beacon buffers when adding" " new interface of type: %i\n", vif->type); ret = -ENOBUFS; goto out; } } if ((vif->type == NL80211_IFTYPE_ADHOC) && sc->nvifs > 0) { ath_err(common, "Cannot create ADHOC interface when other" " interfaces already exist.\n"); ret = -EINVAL; goto out; } ath_dbg(common, ATH_DBG_CONFIG, "Attach a VIF of type: %d\n", vif->type); /* Set the VIF opmode */ avp->av_opmode = vif->type; avp->av_bslot = -1; sc->nvifs++; ath9k_do_vif_add_setup(hw, vif); out: mutex_unlock(&sc->mutex); return ret; } static int ath9k_change_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif, enum nl80211_iftype new_type, bool p2p) { struct ath_softc *sc = hw->priv; struct ath_common *common = ath9k_hw_common(sc->sc_ah); int ret = 0; ath_dbg(common, ATH_DBG_CONFIG, "Change Interface\n"); mutex_lock(&sc->mutex); /* See if new interface type is valid. */ if ((new_type == NL80211_IFTYPE_ADHOC) && (sc->nvifs > 1)) { ath_err(common, "When using ADHOC, it must be the only" " interface.\n"); ret = -EINVAL; goto out; } if (ath9k_uses_beacons(new_type) && !ath9k_uses_beacons(vif->type)) { if (sc->nbcnvifs >= ATH_BCBUF) { ath_err(common, "No beacon slot available\n"); ret = -ENOBUFS; goto out; } } /* Clean up old vif stuff */ if (ath9k_uses_beacons(vif->type)) ath9k_reclaim_beacon(sc, vif); /* Add new settings */ vif->type = new_type; vif->p2p = p2p; ath9k_do_vif_add_setup(hw, vif); out: mutex_unlock(&sc->mutex); return ret; } static void ath9k_remove_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif) { struct ath_softc *sc = hw->priv; struct ath_common *common = ath9k_hw_common(sc->sc_ah); ath_dbg(common, ATH_DBG_CONFIG, "Detach Interface\n"); mutex_lock(&sc->mutex); sc->nvifs--; /* Reclaim beacon resources */ if (ath9k_uses_beacons(vif->type)) ath9k_reclaim_beacon(sc, vif); ath9k_calculate_summary_state(hw, NULL); mutex_unlock(&sc->mutex); } static void ath9k_enable_ps(struct ath_softc *sc) { struct ath_hw *ah = sc->sc_ah; sc->ps_enabled = true; if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) { if ((ah->imask & ATH9K_INT_TIM_TIMER) == 0) { ah->imask |= ATH9K_INT_TIM_TIMER; ath9k_hw_set_interrupts(ah, ah->imask); } ath9k_hw_setrxabort(ah, 1); } } static void ath9k_disable_ps(struct ath_softc *sc) { struct ath_hw *ah = sc->sc_ah; sc->ps_enabled = false; ath9k_hw_setpower(ah, ATH9K_PM_AWAKE); if (!(ah->caps.hw_caps & ATH9K_HW_CAP_AUTOSLEEP)) { ath9k_hw_setrxabort(ah, 0); sc->ps_flags &= ~(PS_WAIT_FOR_BEACON | PS_WAIT_FOR_CAB | PS_WAIT_FOR_PSPOLL_DATA | PS_WAIT_FOR_TX_ACK); if (ah->imask & ATH9K_INT_TIM_TIMER) { ah->imask &= ~ATH9K_INT_TIM_TIMER; ath9k_hw_set_interrupts(ah, ah->imask); } } } static int ath9k_config(struct ieee80211_hw *hw, u32 changed) { struct ath_softc *sc = hw->priv; struct ath_hw *ah = sc->sc_ah; struct ath_common *common = ath9k_hw_common(ah); struct ieee80211_conf *conf = &hw->conf; bool disable_radio = false; mutex_lock(&sc->mutex); /* * Leave this as the first check because we need to turn on the * radio if it was disabled before prior to processing the rest * of the changes. Likewise we must only disable the radio towards * the end. */ if (changed & IEEE80211_CONF_CHANGE_IDLE) { sc->ps_idle = !!(conf->flags & IEEE80211_CONF_IDLE); if (!sc->ps_idle) { ath_radio_enable(sc, hw); ath_dbg(common, ATH_DBG_CONFIG, "not-idle: enabling radio\n"); } else { disable_radio = true; } } /* * We just prepare to enable PS. We have to wait until our AP has * ACK'd our null data frame to disable RX otherwise we'll ignore * those ACKs and end up retransmitting the same null data frames. * IEEE80211_CONF_CHANGE_PS is only passed by mac80211 for STA mode. */ if (changed & IEEE80211_CONF_CHANGE_PS) { unsigned long flags; spin_lock_irqsave(&sc->sc_pm_lock, flags); if (conf->flags & IEEE80211_CONF_PS) ath9k_enable_ps(sc); else ath9k_disable_ps(sc); spin_unlock_irqrestore(&sc->sc_pm_lock, flags); } if (changed & IEEE80211_CONF_CHANGE_MONITOR) { if (conf->flags & IEEE80211_CONF_MONITOR) { ath_dbg(common, ATH_DBG_CONFIG, "Monitor mode is enabled\n"); sc->sc_ah->is_monitoring = true; } else { ath_dbg(common, ATH_DBG_CONFIG, "Monitor mode is disabled\n"); sc->sc_ah->is_monitoring = false; } } if (changed & IEEE80211_CONF_CHANGE_CHANNEL) { struct ieee80211_channel *curchan = hw->conf.channel; int pos = curchan->hw_value; int old_pos = -1; unsigned long flags; if (ah->curchan) old_pos = ah->curchan - &ah->channels[0]; if (hw->conf.flags & IEEE80211_CONF_OFFCHANNEL) sc->sc_flags |= SC_OP_OFFCHANNEL; else sc->sc_flags &= ~SC_OP_OFFCHANNEL; ath_dbg(common, ATH_DBG_CONFIG, "Set channel: %d MHz type: %d\n", curchan->center_freq, conf->channel_type); ath9k_cmn_update_ichannel(&sc->sc_ah->channels[pos], curchan, conf->channel_type); /* update survey stats for the old channel before switching */ spin_lock_irqsave(&common->cc_lock, flags); ath_update_survey_stats(sc); spin_unlock_irqrestore(&common->cc_lock, flags); /* * If the operating channel changes, change the survey in-use flags * along with it. * Reset the survey data for the new channel, unless we're switching * back to the operating channel from an off-channel operation. */ if (!(hw->conf.flags & IEEE80211_CONF_OFFCHANNEL) && sc->cur_survey != &sc->survey[pos]) { if (sc->cur_survey) sc->cur_survey->filled &= ~SURVEY_INFO_IN_USE; sc->cur_survey = &sc->survey[pos]; memset(sc->cur_survey, 0, sizeof(struct survey_info)); sc->cur_survey->filled |= SURVEY_INFO_IN_USE; } else if (!(sc->survey[pos].filled & SURVEY_INFO_IN_USE)) { memset(&sc->survey[pos], 0, sizeof(struct survey_info)); } if (ath_set_channel(sc, hw, &sc->sc_ah->channels[pos]) < 0) { ath_err(common, "Unable to set channel\n"); mutex_unlock(&sc->mutex); return -EINVAL; } /* * The most recent snapshot of channel->noisefloor for the old * channel is only available after the hardware reset. Copy it to * the survey stats now. */ if (old_pos >= 0) ath_update_survey_nf(sc, old_pos); } if (changed & IEEE80211_CONF_CHANGE_POWER) { ath_dbg(common, ATH_DBG_CONFIG, "Set power: %d\n", conf->power_level); sc->config.txpowlimit = 2 * conf->power_level; ath9k_ps_wakeup(sc); ath9k_cmn_update_txpow(ah, sc->curtxpow, sc->config.txpowlimit, &sc->curtxpow); ath9k_ps_restore(sc); } if (disable_radio) { ath_dbg(common, ATH_DBG_CONFIG, "idle: disabling radio\n"); ath_radio_disable(sc, hw); } mutex_unlock(&sc->mutex); return 0; } #define SUPPORTED_FILTERS \ (FIF_PROMISC_IN_BSS | \ FIF_ALLMULTI | \ FIF_CONTROL | \ FIF_PSPOLL | \ FIF_OTHER_BSS | \ FIF_BCN_PRBRESP_PROMISC | \ FIF_PROBE_REQ | \ FIF_FCSFAIL) /* FIXME: sc->sc_full_reset ? */ static void ath9k_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags, unsigned int *total_flags, u64 multicast) { struct ath_softc *sc = hw->priv; u32 rfilt; changed_flags &= SUPPORTED_FILTERS; *total_flags &= SUPPORTED_FILTERS; sc->rx.rxfilter = *total_flags; ath9k_ps_wakeup(sc); rfilt = ath_calcrxfilter(sc); ath9k_hw_setrxfilter(sc->sc_ah, rfilt); ath9k_ps_restore(sc); ath_dbg(ath9k_hw_common(sc->sc_ah), ATH_DBG_CONFIG, "Set HW RX filter: 0x%x\n", rfilt); } static int ath9k_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_sta *sta) { struct ath_softc *sc = hw->priv; ath_node_attach(sc, sta); return 0; } static int ath9k_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_sta *sta) { struct ath_softc *sc = hw->priv; ath_node_detach(sc, sta); return 0; } static int ath9k_conf_tx(struct ieee80211_hw *hw, u16 queue, const struct ieee80211_tx_queue_params *params) { struct ath_softc *sc = hw->priv; struct ath_common *common = ath9k_hw_common(sc->sc_ah); struct ath_txq *txq; struct ath9k_tx_queue_info qi; int ret = 0; if (queue >= WME_NUM_AC) return 0; txq = sc->tx.txq_map[queue]; mutex_lock(&sc->mutex); memset(&qi, 0, sizeof(struct ath9k_tx_queue_info)); qi.tqi_aifs = params->aifs; qi.tqi_cwmin = params->cw_min; qi.tqi_cwmax = params->cw_max; qi.tqi_burstTime = params->txop; ath_dbg(common, ATH_DBG_CONFIG, "Configure tx [queue/halq] [%d/%d], aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n", queue, txq->axq_qnum, params->aifs, params->cw_min, params->cw_max, params->txop); ret = ath_txq_update(sc, txq->axq_qnum, &qi); if (ret) ath_err(common, "TXQ Update failed\n"); if (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC) if (queue == WME_AC_BE && !ret) ath_beaconq_config(sc); mutex_unlock(&sc->mutex); return ret; } static int ath9k_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, struct ieee80211_vif *vif, struct ieee80211_sta *sta, struct ieee80211_key_conf *key) { struct ath_softc *sc = hw->priv; struct ath_common *common = ath9k_hw_common(sc->sc_ah); int ret = 0; if (ath9k_modparam_nohwcrypt) return -ENOSPC; mutex_lock(&sc->mutex); ath9k_ps_wakeup(sc); ath_dbg(common, ATH_DBG_CONFIG, "Set HW Key\n"); switch (cmd) { case SET_KEY: ret = ath_key_config(common, vif, sta, key); if (ret >= 0) { key->hw_key_idx = ret; /* push IV and Michael MIC generation to stack */ key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; if (key->cipher == WLAN_CIPHER_SUITE_TKIP) key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC; if (sc->sc_ah->sw_mgmt_crypto && key->cipher == WLAN_CIPHER_SUITE_CCMP) key->flags |= IEEE80211_KEY_FLAG_SW_MGMT; ret = 0; } break; case DISABLE_KEY: ath_key_delete(common, key); break; default: ret = -EINVAL; } ath9k_ps_restore(sc); mutex_unlock(&sc->mutex); return ret; } static void ath9k_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_bss_conf *bss_conf, u32 changed) { struct ath_softc *sc = hw->priv; struct ath_beacon_config *cur_conf = &sc->cur_beacon_conf; struct ath_hw *ah = sc->sc_ah; struct ath_common *common = ath9k_hw_common(ah); struct ath_vif *avp = (void *)vif->drv_priv; int slottime; int error; mutex_lock(&sc->mutex); if (changed & BSS_CHANGED_BSSID) { /* Set BSSID */ memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN); memcpy(avp->bssid, bss_conf->bssid, ETH_ALEN); common->curaid = 0; ath9k_hw_write_associd(ah); /* Set aggregation protection mode parameters */ sc->config.ath_aggr_prot = 0; ath_dbg(common, ATH_DBG_CONFIG, "BSSID: %pM aid: 0x%x\n", common->curbssid, common->curaid); /* need to reconfigure the beacon */ sc->sc_flags &= ~SC_OP_BEACONS ; } /* Enable transmission of beacons (AP, IBSS, MESH) */ if ((changed & BSS_CHANGED_BEACON) || ((changed & BSS_CHANGED_BEACON_ENABLED) && bss_conf->enable_beacon)) { ath9k_set_beaconing_status(sc, false); error = ath_beacon_alloc(sc, vif); if (!error) ath_beacon_config(sc, vif); ath9k_set_beaconing_status(sc, true); } if (changed & BSS_CHANGED_ERP_SLOT) { if (bss_conf->use_short_slot) slottime = 9; else slottime = 20; if (vif->type == NL80211_IFTYPE_AP) { /* * Defer update, so that connected stations can adjust * their settings at the same time. * See beacon.c for more details */ sc->beacon.slottime = slottime; sc->beacon.updateslot = UPDATE; } else { ah->slottime = slottime; ath9k_hw_init_global_settings(ah); } } /* Disable transmission of beacons */ if ((changed & BSS_CHANGED_BEACON_ENABLED) && !bss_conf->enable_beacon) { ath9k_set_beaconing_status(sc, false); avp->is_bslot_active = false; ath9k_set_beaconing_status(sc, true); } if (changed & BSS_CHANGED_BEACON_INT) { cur_conf->beacon_interval = bss_conf->beacon_int; /* * In case of AP mode, the HW TSF has to be reset * when the beacon interval changes. */ if (vif->type == NL80211_IFTYPE_AP) { sc->sc_flags |= SC_OP_TSF_RESET; ath9k_set_beaconing_status(sc, false); error = ath_beacon_alloc(sc, vif); if (!error) ath_beacon_config(sc, vif); ath9k_set_beaconing_status(sc, true); } else { ath_beacon_config(sc, vif); } } if (changed & BSS_CHANGED_ERP_PREAMBLE) { ath_dbg(common, ATH_DBG_CONFIG, "BSS Changed PREAMBLE %d\n", bss_conf->use_short_preamble); if (bss_conf->use_short_preamble) sc->sc_flags |= SC_OP_PREAMBLE_SHORT; else sc->sc_flags &= ~SC_OP_PREAMBLE_SHORT; } if (changed & BSS_CHANGED_ERP_CTS_PROT) { ath_dbg(common, ATH_DBG_CONFIG, "BSS Changed CTS PROT %d\n", bss_conf->use_cts_prot); if (bss_conf->use_cts_prot && hw->conf.channel->band != IEEE80211_BAND_5GHZ) sc->sc_flags |= SC_OP_PROTECT_ENABLE; else sc->sc_flags &= ~SC_OP_PROTECT_ENABLE; } if (changed & BSS_CHANGED_ASSOC) { ath_dbg(common, ATH_DBG_CONFIG, "BSS Changed ASSOC %d\n", bss_conf->assoc); ath9k_bss_assoc_info(sc, hw, vif, bss_conf); } mutex_unlock(&sc->mutex); } static u64 ath9k_get_tsf(struct ieee80211_hw *hw) { struct ath_softc *sc = hw->priv; u64 tsf; mutex_lock(&sc->mutex); ath9k_ps_wakeup(sc); tsf = ath9k_hw_gettsf64(sc->sc_ah); ath9k_ps_restore(sc); mutex_unlock(&sc->mutex); return tsf; } static void ath9k_set_tsf(struct ieee80211_hw *hw, u64 tsf) { struct ath_softc *sc = hw->priv; mutex_lock(&sc->mutex); ath9k_ps_wakeup(sc); ath9k_hw_settsf64(sc->sc_ah, tsf); ath9k_ps_restore(sc); mutex_unlock(&sc->mutex); } static void ath9k_reset_tsf(struct ieee80211_hw *hw) { struct ath_softc *sc = hw->priv; mutex_lock(&sc->mutex); ath9k_ps_wakeup(sc); ath9k_hw_reset_tsf(sc->sc_ah); ath9k_ps_restore(sc); mutex_unlock(&sc->mutex); } static int ath9k_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif, enum ieee80211_ampdu_mlme_action action, struct ieee80211_sta *sta, u16 tid, u16 *ssn, u8 buf_size) { struct ath_softc *sc = hw->priv; int ret = 0; local_bh_disable(); switch (action) { case IEEE80211_AMPDU_RX_START: if (!(sc->sc_flags & SC_OP_RXAGGR)) ret = -ENOTSUPP; break; case IEEE80211_AMPDU_RX_STOP: break; case IEEE80211_AMPDU_TX_START: if (!(sc->sc_flags & SC_OP_TXAGGR)) return -EOPNOTSUPP; ath9k_ps_wakeup(sc); ret = ath_tx_aggr_start(sc, sta, tid, ssn); if (!ret) ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid); ath9k_ps_restore(sc); break; case IEEE80211_AMPDU_TX_STOP: ath9k_ps_wakeup(sc); ath_tx_aggr_stop(sc, sta, tid); ieee80211_stop_tx_ba_cb_irqsafe(vif, sta->addr, tid); ath9k_ps_restore(sc); break; case IEEE80211_AMPDU_TX_OPERATIONAL: ath9k_ps_wakeup(sc); ath_tx_aggr_resume(sc, sta, tid); ath9k_ps_restore(sc); break; default: ath_err(ath9k_hw_common(sc->sc_ah), "Unknown AMPDU action\n"); } local_bh_enable(); return ret; } static int ath9k_get_survey(struct ieee80211_hw *hw, int idx, struct survey_info *survey) { struct ath_softc *sc = hw->priv; struct ath_common *common = ath9k_hw_common(sc->sc_ah); struct ieee80211_supported_band *sband; struct ieee80211_channel *chan; unsigned long flags; int pos; spin_lock_irqsave(&common->cc_lock, flags); if (idx == 0) ath_update_survey_stats(sc); sband = hw->wiphy->bands[IEEE80211_BAND_2GHZ]; if (sband && idx >= sband->n_channels) { idx -= sband->n_channels; sband = NULL; } if (!sband) sband = hw->wiphy->bands[IEEE80211_BAND_5GHZ]; if (!sband || idx >= sband->n_channels) { spin_unlock_irqrestore(&common->cc_lock, flags); return -ENOENT; } chan = &sband->channels[idx]; pos = chan->hw_value; memcpy(survey, &sc->survey[pos], sizeof(*survey)); survey->channel = chan; spin_unlock_irqrestore(&common->cc_lock, flags); return 0; } static void ath9k_set_coverage_class(struct ieee80211_hw *hw, u8 coverage_class) { struct ath_softc *sc = hw->priv; struct ath_hw *ah = sc->sc_ah; mutex_lock(&sc->mutex); ah->coverage_class = coverage_class; ath9k_hw_init_global_settings(ah); mutex_unlock(&sc->mutex); } static void ath9k_flush(struct ieee80211_hw *hw, bool drop) { struct ath_softc *sc = hw->priv; int timeout = 200; /* ms */ int i, j; ath9k_ps_wakeup(sc); mutex_lock(&sc->mutex); cancel_delayed_work_sync(&sc->tx_complete_work); if (drop) timeout = 1; for (j = 0; j < timeout; j++) { int npend = 0; if (j) usleep_range(1000, 2000); for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) { if (!ATH_TXQ_SETUP(sc, i)) continue; npend += ath9k_has_pending_frames(sc, &sc->tx.txq[i]); } if (!npend) goto out; } if (!ath_drain_all_txq(sc, false)) ath_reset(sc, false); ieee80211_wake_queues(hw); out: ieee80211_queue_delayed_work(hw, &sc->tx_complete_work, 0); mutex_unlock(&sc->mutex); ath9k_ps_restore(sc); } struct ieee80211_ops ath9k_ops = { .tx = ath9k_tx, .start = ath9k_start, .stop = ath9k_stop, .add_interface = ath9k_add_interface, .change_interface = ath9k_change_interface, .remove_interface = ath9k_remove_interface, .config = ath9k_config, .configure_filter = ath9k_configure_filter, .sta_add = ath9k_sta_add, .sta_remove = ath9k_sta_remove, .conf_tx = ath9k_conf_tx, .bss_info_changed = ath9k_bss_info_changed, .set_key = ath9k_set_key, .get_tsf = ath9k_get_tsf, .set_tsf = ath9k_set_tsf, .reset_tsf = ath9k_reset_tsf, .ampdu_action = ath9k_ampdu_action, .get_survey = ath9k_get_survey, .rfkill_poll = ath9k_rfkill_poll_state, .set_coverage_class = ath9k_set_coverage_class, .flush = ath9k_flush, };