/* * Copyright (c) 2008-2011 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 void ath9k_set_assoc_state(struct ath_softc *sc, struct ieee80211_vif *vif); u8 ath9k_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; spin_unlock_bh(&txq->axq_lock); return pending; } static 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 ath_ps_full_sleep(unsigned long data) { struct ath_softc *sc = (struct ath_softc *) data; struct ath_common *common = ath9k_hw_common(sc->sc_ah); bool reset; spin_lock(&common->cc_lock); ath_hw_cycle_counters_update(common); spin_unlock(&common->cc_lock); ath9k_hw_setrxabort(sc->sc_ah, 1); ath9k_hw_stopdmarecv(sc->sc_ah, &reset); ath9k_hw_setpower(sc->sc_ah, ATH9K_PM_FULL_SLEEP); } 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; del_timer_sync(&sc->sleep_timer); 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)); memset(&common->cc_ani, 0, sizeof(common->cc_ani)); 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); enum ath9k_power_mode mode; unsigned long flags; spin_lock_irqsave(&sc->sc_pm_lock, flags); if (--sc->ps_usecount != 0) goto unlock; if (sc->ps_idle) { mod_timer(&sc->sleep_timer, jiffies + HZ / 10); goto unlock; } 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 | PS_WAIT_FOR_ANI))) { mode = ATH9K_PM_NETWORK_SLEEP; if (ath9k_hw_btcoex_is_enabled(sc->sc_ah)) ath9k_btcoex_stop_gen_timer(sc); } else { goto unlock; } spin_lock(&common->cc_lock); ath_hw_cycle_counters_update(common); spin_unlock(&common->cc_lock); ath9k_hw_setpower(sc->sc_ah, mode); unlock: spin_unlock_irqrestore(&sc->sc_pm_lock, flags); } static void __ath_cancel_work(struct ath_softc *sc) { cancel_work_sync(&sc->paprd_work); cancel_delayed_work_sync(&sc->tx_complete_work); cancel_delayed_work_sync(&sc->hw_pll_work); #ifdef CONFIG_ATH9K_BTCOEX_SUPPORT if (ath9k_hw_mci_is_enabled(sc->sc_ah)) cancel_work_sync(&sc->mci_work); #endif } void ath_cancel_work(struct ath_softc *sc) { __ath_cancel_work(sc); cancel_work_sync(&sc->hw_reset_work); } void ath_restart_work(struct ath_softc *sc) { ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0); if (AR_SREV_9340(sc->sc_ah) || AR_SREV_9330(sc->sc_ah)) ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work, msecs_to_jiffies(ATH_PLL_WORK_INTERVAL)); ath_start_ani(sc); } static bool ath_prepare_reset(struct ath_softc *sc) { struct ath_hw *ah = sc->sc_ah; bool ret = true; ieee80211_stop_queues(sc->hw); ath_stop_ani(sc); ath9k_hw_disable_interrupts(ah); if (!ath_drain_all_txq(sc)) ret = false; if (!ath_stoprecv(sc)) ret = false; return ret; } static bool ath_complete_reset(struct ath_softc *sc, bool start) { struct ath_hw *ah = sc->sc_ah; struct ath_common *common = ath9k_hw_common(ah); unsigned long flags; int i; if (ath_startrecv(sc) != 0) { ath_err(common, "Unable to restart recv logic\n"); return false; } ath9k_cmn_update_txpow(ah, sc->curtxpow, sc->config.txpowlimit, &sc->curtxpow); clear_bit(ATH_OP_HW_RESET, &common->op_flags); ath9k_hw_set_interrupts(ah); ath9k_hw_enable_interrupts(ah); if (!(sc->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL) && start) { if (!test_bit(ATH_OP_BEACONS, &common->op_flags)) goto work; if (ah->opmode == NL80211_IFTYPE_STATION && test_bit(ATH_OP_PRIM_STA_VIF, &common->op_flags)) { spin_lock_irqsave(&sc->sc_pm_lock, flags); sc->ps_flags |= PS_BEACON_SYNC | PS_WAIT_FOR_BEACON; spin_unlock_irqrestore(&sc->sc_pm_lock, flags); } else { ath9k_set_beacon(sc); } work: ath_restart_work(sc); for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) { if (!ATH_TXQ_SETUP(sc, i)) continue; 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); } } sc->gtt_cnt = 0; ieee80211_wake_queues(sc->hw); ath9k_p2p_ps_timer(sc); return true; } static int ath_reset_internal(struct ath_softc *sc, struct ath9k_channel *hchan) { struct ath_hw *ah = sc->sc_ah; struct ath_common *common = ath9k_hw_common(ah); struct ath9k_hw_cal_data *caldata = NULL; bool fastcc = true; int r; __ath_cancel_work(sc); tasklet_disable(&sc->intr_tq); spin_lock_bh(&sc->sc_pcu_lock); if (!(sc->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)) { fastcc = false; caldata = &sc->caldata; } if (!hchan) { fastcc = false; hchan = ah->curchan; } if (!ath_prepare_reset(sc)) fastcc = false; ath_dbg(common, CONFIG, "Reset to %u MHz, HT40: %d fastcc: %d\n", hchan->channel, IS_CHAN_HT40(hchan), fastcc); r = ath9k_hw_reset(ah, hchan, caldata, fastcc); if (r) { ath_err(common, "Unable to reset channel, reset status %d\n", r); ath9k_hw_enable_interrupts(ah); ath9k_queue_reset(sc, RESET_TYPE_BB_HANG); goto out; } if (ath9k_hw_mci_is_enabled(sc->sc_ah) && (sc->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)) ath9k_mci_set_txpower(sc, true, false); if (!ath_complete_reset(sc, true)) r = -EIO; out: spin_unlock_bh(&sc->sc_pcu_lock); tasklet_enable(&sc->intr_tq); return r; } /* * 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. */ static int ath_set_channel(struct ath_softc *sc, struct cfg80211_chan_def *chandef) { struct ath_hw *ah = sc->sc_ah; struct ath_common *common = ath9k_hw_common(ah); struct ieee80211_hw *hw = sc->hw; struct ath9k_channel *hchan; struct ieee80211_channel *chan = chandef->chan; bool offchannel; int pos = chan->hw_value; int old_pos = -1; int r; if (test_bit(ATH_OP_INVALID, &common->op_flags)) return -EIO; offchannel = !!(hw->conf.flags & IEEE80211_CONF_OFFCHANNEL); if (ah->curchan) old_pos = ah->curchan - &ah->channels[0]; ath_dbg(common, CONFIG, "Set channel: %d MHz width: %d\n", chan->center_freq, chandef->width); /* update survey stats for the old channel before switching */ spin_lock_bh(&common->cc_lock); ath_update_survey_stats(sc); spin_unlock_bh(&common->cc_lock); ath9k_cmn_get_channel(hw, ah, chandef); /* * 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 (!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)); } hchan = &sc->sc_ah->channels[pos]; r = ath_reset_internal(sc, hchan); if (r) return r; /* * 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); /* * Enable radar pulse detection if on a DFS channel. Spectral * scanning and radar detection can not be used concurrently. */ if (hw->conf.radar_enabled) { u32 rxfilter; /* set HW specific DFS configuration */ ath9k_hw_set_radar_params(ah); rxfilter = ath9k_hw_getrxfilter(ah); rxfilter |= ATH9K_RX_FILTER_PHYRADAR | ATH9K_RX_FILTER_PHYERR; ath9k_hw_setrxfilter(ah, rxfilter); ath_dbg(common, DFS, "DFS enabled at freq %d\n", chan->center_freq); } else { /* perform spectral scan if requested. */ if (test_bit(ATH_OP_SCANNING, &common->op_flags) && sc->spectral_mode == SPECTRAL_CHANSCAN) ath9k_spectral_scan_trigger(hw); } return 0; } static void ath_node_attach(struct ath_softc *sc, struct ieee80211_sta *sta, struct ieee80211_vif *vif) { struct ath_node *an; an = (struct ath_node *)sta->drv_priv; an->sc = sc; an->sta = sta; an->vif = vif; ath_tx_node_init(sc, an); } static void ath_node_detach(struct ath_softc *sc, struct ieee80211_sta *sta) { struct ath_node *an = (struct ath_node *)sta->drv_priv; ath_tx_node_cleanup(sc, an); } 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); enum ath_reset_type type; unsigned long flags; u32 status = sc->intrstatus; u32 rxmask; ath9k_ps_wakeup(sc); spin_lock(&sc->sc_pcu_lock); if (status & ATH9K_INT_FATAL) { type = RESET_TYPE_FATAL_INT; ath9k_queue_reset(sc, type); /* * Increment the ref. counter here so that * interrupts are enabled in the reset routine. */ atomic_inc(&ah->intr_ref_cnt); ath_dbg(common, RESET, "FATAL: Skipping interrupts\n"); goto out; } if ((ah->config.hw_hang_checks & HW_BB_WATCHDOG) && (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); if (ar9003_hw_bb_watchdog_check(ah)) { type = RESET_TYPE_BB_WATCHDOG; ath9k_queue_reset(sc, type); /* * Increment the ref. counter here so that * interrupts are enabled in the reset routine. */ atomic_inc(&ah->intr_ref_cnt); ath_dbg(common, RESET, "BB_WATCHDOG: Skipping interrupts\n"); goto out; } } if (status & ATH9K_INT_GTT) { sc->gtt_cnt++; if ((sc->gtt_cnt >= MAX_GTT_CNT) && !ath9k_hw_check_alive(ah)) { type = RESET_TYPE_TX_GTT; ath9k_queue_reset(sc, type); atomic_inc(&ah->intr_ref_cnt); ath_dbg(common, RESET, "GTT: Skipping interrupts\n"); goto out; } } spin_lock_irqsave(&sc->sc_pm_lock, flags); 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, PS, "TSFOOR - Sync with next Beacon\n"); sc->ps_flags |= PS_WAIT_FOR_BEACON | PS_BEACON_SYNC; } spin_unlock_irqrestore(&sc->sc_pm_lock, flags); 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) { /* * For EDMA chips, TX completion is enabled for the * beacon queue, so if a beacon has been transmitted * successfully after a GTT interrupt, the GTT counter * gets reset to zero here. */ sc->gtt_cnt = 0; ath_tx_edma_tasklet(sc); } else { ath_tx_tasklet(sc); } wake_up(&sc->tx_wait); } if (status & ATH9K_INT_GENTIMER) ath_gen_timer_isr(sc->sc_ah); ath9k_btcoex_handle_interrupt(sc, status); /* re-enable hardware interrupt */ ath9k_hw_enable_interrupts(ah); out: 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_BB_WATCHDOG | \ 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_GTT | \ ATH9K_INT_TSFOOR | \ ATH9K_INT_GENTIMER | \ ATH9K_INT_MCI) struct ath_softc *sc = dev; struct ath_hw *ah = sc->sc_ah; struct ath_common *common = ath9k_hw_common(ah); enum ath9k_int status; u32 sync_cause = 0; 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 (test_bit(ATH_OP_INVALID, &common->op_flags)) return IRQ_NONE; /* shared irq, not for us */ if (!ath9k_hw_intrpend(ah)) return IRQ_NONE; if (test_bit(ATH_OP_HW_RESET, &common->op_flags)) { ath9k_hw_kill_interrupts(ah); return IRQ_HANDLED; } /* * 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, &sync_cause); /* NB: clears ISR too */ ath9k_debug_sync_cause(sc, sync_cause); 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->config.hw_hang_checks & HW_BB_WATCHDOG) && (status & ATH9K_INT_BB_WATCHDOG)) goto chip_reset; #ifdef CONFIG_ATH9K_WOW if (status & ATH9K_INT_BMISS) { if (atomic_read(&sc->wow_sleep_proc_intr) == 0) { atomic_inc(&sc->wow_got_bmiss_intr); atomic_dec(&sc->wow_sleep_proc_intr); } } #endif if (status & ATH9K_INT_SWBA) tasklet_schedule(&sc->bcon_tasklet); if (status & ATH9K_INT_TXURN) ath9k_hw_updatetxtriglevel(ah, true); if (status & ATH9K_INT_RXEOL) { ah->imask &= ~(ATH9K_INT_RXEOL | ATH9K_INT_RXORN); ath9k_hw_set_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); spin_lock(&sc->sc_pm_lock); ath9k_hw_setrxabort(sc->sc_ah, 0); sc->ps_flags |= PS_WAIT_FOR_BEACON; spin_unlock(&sc->sc_pm_lock); } 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 } int ath_reset(struct ath_softc *sc) { int r; ath9k_ps_wakeup(sc); r = ath_reset_internal(sc, NULL); ath9k_ps_restore(sc); return r; } void ath9k_queue_reset(struct ath_softc *sc, enum ath_reset_type type) { struct ath_common *common = ath9k_hw_common(sc->sc_ah); #ifdef CONFIG_ATH9K_DEBUGFS RESET_STAT_INC(sc, type); #endif set_bit(ATH_OP_HW_RESET, &common->op_flags); ieee80211_queue_work(sc->hw, &sc->hw_reset_work); } void ath_reset_work(struct work_struct *work) { struct ath_softc *sc = container_of(work, struct ath_softc, hw_reset_work); ath_reset(sc); } /**********************/ /* 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.chandef.chan; struct ath9k_channel *init_channel; int r; ath_dbg(common, CONFIG, "Starting driver with initial channel: %d MHz\n", curchan->center_freq); ath9k_ps_wakeup(sc); mutex_lock(&sc->mutex); init_channel = ath9k_cmn_get_channel(hw, ah, &hw->conf.chandef); /* Reset SERDES registers */ ath9k_hw_configpcipowersave(ah, false); /* * 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); atomic_set(&ah->intr_ref_cnt, -1); 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); ah->reset_power_on = false; } /* 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; else ah->imask |= ATH9K_INT_RX; if (ah->config.hw_hang_checks & HW_BB_WATCHDOG) ah->imask |= ATH9K_INT_BB_WATCHDOG; /* * Enable GTT interrupts only for AR9003/AR9004 chips * for now. */ if (AR_SREV_9300_20_OR_LATER(ah)) ah->imask |= ATH9K_INT_GTT; if (ah->caps.hw_caps & ATH9K_HW_CAP_HT) ah->imask |= ATH9K_INT_CST; ath_mci_enable(sc); clear_bit(ATH_OP_INVALID, &common->op_flags); sc->sc_ah->is_monitoring = false; if (!ath_complete_reset(sc, false)) ah->reset_power_on = false; if (ah->led_pin >= 0) { ath9k_hw_cfg_output(ah, ah->led_pin, AR_GPIO_OUTPUT_MUX_AS_OUTPUT); ath9k_hw_set_gpio(ah, ah->led_pin, 0); } /* * Reset key cache to sane defaults (all entries cleared) instead of * semi-random values after suspend/resume. */ ath9k_cmn_init_crypto(sc->sc_ah); ath9k_hw_reset_tsf(ah); spin_unlock_bh(&sc->sc_pcu_lock); mutex_unlock(&sc->mutex); ath9k_ps_restore(sc); return 0; } static void ath9k_tx(struct ieee80211_hw *hw, struct ieee80211_tx_control *control, 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; unsigned long flags; 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, 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_NETWORK_SLEEP)) { /* * 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); spin_lock_irqsave(&sc->sc_pm_lock, flags); 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, PS, "Sending PS-Poll to pick a buffered frame\n"); sc->ps_flags |= PS_WAIT_FOR_PSPOLL_DATA; } else { ath_dbg(common, PS, "Wake up to complete TX\n"); sc->ps_flags |= PS_WAIT_FOR_TX_ACK; } /* * The actual restore operation will happen only after * the ps_flags bit is cleared. We are just dropping * the ps_usecount here. */ spin_unlock_irqrestore(&sc->sc_pm_lock, flags); ath9k_ps_restore(sc); } /* * Cannot tx while the hardware is in full sleep, it first needs a full * chip reset to recover from that */ if (unlikely(sc->sc_ah->power_mode == ATH9K_PM_FULL_SLEEP)) { ath_err(common, "TX while HW is in FULL_SLEEP mode\n"); goto exit; } memset(&txctl, 0, sizeof(struct ath_tx_control)); txctl.txq = sc->tx.txq_map[skb_get_queue_mapping(skb)]; txctl.sta = control->sta; ath_dbg(common, XMIT, "transmitting packet, skb: %p\n", skb); if (ath_tx_start(hw, skb, &txctl) != 0) { ath_dbg(common, XMIT, "TX failed\n"); TX_STAT_INC(txctl.txq->axq_qnum, txfailed); goto exit; } return; exit: ieee80211_free_txskb(hw, 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); bool prev_idle; mutex_lock(&sc->mutex); ath_cancel_work(sc); if (test_bit(ATH_OP_INVALID, &common->op_flags)) { ath_dbg(common, 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); 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); 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); prev_idle = sc->ps_idle; sc->ps_idle = true; spin_lock_bh(&sc->sc_pcu_lock); if (ah->led_pin >= 0) { ath9k_hw_set_gpio(ah, ah->led_pin, 1); ath9k_hw_cfg_gpio_input(ah, ah->led_pin); } ath_prepare_reset(sc); if (sc->rx.frag) { dev_kfree_skb_any(sc->rx.frag); sc->rx.frag = NULL; } if (!ah->curchan) ah->curchan = ath9k_cmn_get_channel(hw, ah, &hw->conf.chandef); ath9k_hw_reset(ah, ah->curchan, ah->caldata, false); ath9k_hw_phy_disable(ah); ath9k_hw_configpcipowersave(ah, true); spin_unlock_bh(&sc->sc_pcu_lock); ath9k_ps_restore(sc); set_bit(ATH_OP_INVALID, &common->op_flags); sc->ps_idle = prev_idle; mutex_unlock(&sc->mutex); ath_dbg(common, CONFIG, "Driver halt\n"); } static 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_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif) { struct ath9k_vif_iter_data *iter_data = data; int i; if (iter_data->has_hw_macaddr) { for (i = 0; i < ETH_ALEN; i++) iter_data->mask[i] &= ~(iter_data->hw_macaddr[i] ^ mac[i]); } else { memcpy(iter_data->hw_macaddr, mac, ETH_ALEN); iter_data->has_hw_macaddr = true; } 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: break; } } static void ath9k_sta_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif) { struct ath_softc *sc = data; struct ath_vif *avp = (void *)vif->drv_priv; if (vif->type != NL80211_IFTYPE_STATION) return; if (avp->primary_sta_vif) ath9k_set_assoc_state(sc, vif); } /* 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); /* * Pick the MAC address of the first interface as the new hardware * MAC address. The hardware will use it together with the BSSID mask * when matching addresses. */ memset(iter_data, 0, sizeof(*iter_data)); 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, IEEE80211_IFACE_ITER_RESUME_ALL, ath9k_vif_iter, iter_data); memcpy(common->macaddr, iter_data->hw_macaddr, ETH_ALEN); } /* 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; enum nl80211_iftype old_opmode = ah->opmode; ath9k_calculate_iter_data(hw, vif, &iter_data); memcpy(common->bssidmask, iter_data.mask, ETH_ALEN); ath_hw_setbssidmask(common); if (iter_data.naps > 0) { ath9k_hw_set_tsfadjust(ah, true); ah->opmode = NL80211_IFTYPE_AP; } else { ath9k_hw_set_tsfadjust(ah, false); if (iter_data.nmeshes) ah->opmode = NL80211_IFTYPE_MESH_POINT; else if (iter_data.nwds) ah->opmode = NL80211_IFTYPE_AP; else if (iter_data.nadhocs) ah->opmode = NL80211_IFTYPE_ADHOC; else ah->opmode = NL80211_IFTYPE_STATION; } ath9k_hw_setopmode(ah); if ((iter_data.nstations + iter_data.nadhocs + iter_data.nmeshes) > 0) ah->imask |= ATH9K_INT_TSFOOR; else ah->imask &= ~ATH9K_INT_TSFOOR; ath9k_hw_set_interrupts(ah); /* * If we are changing the opmode to STATION, * a beacon sync needs to be done. */ if (ah->opmode == NL80211_IFTYPE_STATION && old_opmode == NL80211_IFTYPE_AP && test_bit(ATH_OP_PRIM_STA_VIF, &common->op_flags)) { ieee80211_iterate_active_interfaces_atomic( sc->hw, IEEE80211_IFACE_ITER_RESUME_ALL, ath9k_sta_vif_iter, sc); } } 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; struct ath_node *an = &avp->mcast_node; mutex_lock(&sc->mutex); if (config_enabled(CONFIG_ATH9K_TX99)) { if (sc->nvifs >= 1) { mutex_unlock(&sc->mutex); return -EOPNOTSUPP; } sc->tx99_vif = vif; } ath_dbg(common, CONFIG, "Attach a VIF of type: %d\n", vif->type); sc->nvifs++; ath9k_ps_wakeup(sc); ath9k_calculate_summary_state(hw, vif); ath9k_ps_restore(sc); if (ath9k_uses_beacons(vif->type)) ath9k_beacon_assign_slot(sc, vif); avp->vif = vif; an->sc = sc; an->sta = NULL; an->vif = vif; an->no_ps_filter = true; ath_tx_node_init(sc, an); mutex_unlock(&sc->mutex); return 0; } 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); mutex_lock(&sc->mutex); if (config_enabled(CONFIG_ATH9K_TX99)) { mutex_unlock(&sc->mutex); return -EOPNOTSUPP; } ath_dbg(common, CONFIG, "Change Interface\n"); if (ath9k_uses_beacons(vif->type)) ath9k_beacon_remove_slot(sc, vif); vif->type = new_type; vif->p2p = p2p; ath9k_ps_wakeup(sc); ath9k_calculate_summary_state(hw, vif); ath9k_ps_restore(sc); if (ath9k_uses_beacons(vif->type)) ath9k_beacon_assign_slot(sc, vif); mutex_unlock(&sc->mutex); return 0; } static void ath9k_update_p2p_ps_timer(struct ath_softc *sc, struct ath_vif *avp) { struct ath_hw *ah = sc->sc_ah; s32 tsf, target_tsf; if (!avp || !avp->noa.has_next_tsf) return; ath9k_hw_gen_timer_stop(ah, sc->p2p_ps_timer); tsf = ath9k_hw_gettsf32(sc->sc_ah); target_tsf = avp->noa.next_tsf; if (!avp->noa.absent) target_tsf -= ATH_P2P_PS_STOP_TIME; if (target_tsf - tsf < ATH_P2P_PS_STOP_TIME) target_tsf = tsf + ATH_P2P_PS_STOP_TIME; ath9k_hw_gen_timer_start(ah, sc->p2p_ps_timer, (u32) target_tsf, 1000000); } 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); struct ath_vif *avp = (void *)vif->drv_priv; ath_dbg(common, CONFIG, "Detach Interface\n"); mutex_lock(&sc->mutex); spin_lock_bh(&sc->sc_pcu_lock); if (avp == sc->p2p_ps_vif) { sc->p2p_ps_vif = NULL; ath9k_update_p2p_ps_timer(sc, NULL); } spin_unlock_bh(&sc->sc_pcu_lock); sc->nvifs--; sc->tx99_vif = NULL; if (ath9k_uses_beacons(vif->type)) ath9k_beacon_remove_slot(sc, vif); ath9k_ps_wakeup(sc); ath9k_calculate_summary_state(hw, NULL); ath9k_ps_restore(sc); ath_tx_node_cleanup(sc, &avp->mcast_node); mutex_unlock(&sc->mutex); } static void ath9k_enable_ps(struct ath_softc *sc) { struct ath_hw *ah = sc->sc_ah; struct ath_common *common = ath9k_hw_common(ah); if (config_enabled(CONFIG_ATH9K_TX99)) return; 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); } ath9k_hw_setrxabort(ah, 1); } ath_dbg(common, PS, "PowerSave enabled\n"); } static void ath9k_disable_ps(struct ath_softc *sc) { struct ath_hw *ah = sc->sc_ah; struct ath_common *common = ath9k_hw_common(ah); if (config_enabled(CONFIG_ATH9K_TX99)) return; 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); } } ath_dbg(common, PS, "PowerSave disabled\n"); } void ath9k_spectral_scan_trigger(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); u32 rxfilter; if (config_enabled(CONFIG_ATH9K_TX99)) return; if (!ath9k_hw_ops(ah)->spectral_scan_trigger) { ath_err(common, "spectrum analyzer not implemented on this hardware\n"); return; } ath9k_ps_wakeup(sc); rxfilter = ath9k_hw_getrxfilter(ah); ath9k_hw_setrxfilter(ah, rxfilter | ATH9K_RX_FILTER_PHYRADAR | ATH9K_RX_FILTER_PHYERR); /* TODO: usually this should not be neccesary, but for some reason * (or in some mode?) the trigger must be called after the * configuration, otherwise the register will have its values reset * (on my ar9220 to value 0x01002310) */ ath9k_spectral_scan_config(hw, sc->spectral_mode); ath9k_hw_ops(ah)->spectral_scan_trigger(ah); ath9k_ps_restore(sc); } int ath9k_spectral_scan_config(struct ieee80211_hw *hw, enum spectral_mode spectral_mode) { struct ath_softc *sc = hw->priv; struct ath_hw *ah = sc->sc_ah; struct ath_common *common = ath9k_hw_common(ah); if (!ath9k_hw_ops(ah)->spectral_scan_trigger) { ath_err(common, "spectrum analyzer not implemented on this hardware\n"); return -1; } switch (spectral_mode) { case SPECTRAL_DISABLED: sc->spec_config.enabled = 0; break; case SPECTRAL_BACKGROUND: /* send endless samples. * TODO: is this really useful for "background"? */ sc->spec_config.endless = 1; sc->spec_config.enabled = 1; break; case SPECTRAL_CHANSCAN: case SPECTRAL_MANUAL: sc->spec_config.endless = 0; sc->spec_config.enabled = 1; break; default: return -1; } ath9k_ps_wakeup(sc); ath9k_hw_ops(ah)->spectral_scan_config(ah, &sc->spec_config); ath9k_ps_restore(sc); sc->spectral_mode = spectral_mode; return 0; } 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 reset_channel = false; ath9k_ps_wakeup(sc); mutex_lock(&sc->mutex); if (changed & IEEE80211_CONF_CHANGE_IDLE) { sc->ps_idle = !!(conf->flags & IEEE80211_CONF_IDLE); if (sc->ps_idle) { ath_cancel_work(sc); ath9k_stop_btcoex(sc); } else { ath9k_start_btcoex(sc); /* * The chip needs a reset to properly wake up from * full sleep */ reset_channel = ah->chip_fullsleep; } } /* * 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, CONFIG, "Monitor mode is enabled\n"); sc->sc_ah->is_monitoring = true; } else { ath_dbg(common, CONFIG, "Monitor mode is disabled\n"); sc->sc_ah->is_monitoring = false; } } if ((changed & IEEE80211_CONF_CHANGE_CHANNEL) || reset_channel) { if (ath_set_channel(sc, &hw->conf.chandef) < 0) { ath_err(common, "Unable to set channel\n"); mutex_unlock(&sc->mutex); ath9k_ps_restore(sc); return -EINVAL; } } if (changed & IEEE80211_CONF_CHANGE_POWER) { ath_dbg(common, CONFIG, "Set power: %d\n", conf->power_level); sc->config.txpowlimit = 2 * conf->power_level; ath9k_cmn_update_txpow(ah, sc->curtxpow, sc->config.txpowlimit, &sc->curtxpow); } mutex_unlock(&sc->mutex); ath9k_ps_restore(sc); 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), 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; struct ath_common *common = ath9k_hw_common(sc->sc_ah); struct ath_node *an = (struct ath_node *) sta->drv_priv; struct ieee80211_key_conf ps_key = { }; int key; ath_node_attach(sc, sta, vif); if (vif->type != NL80211_IFTYPE_AP && vif->type != NL80211_IFTYPE_AP_VLAN) return 0; key = ath_key_config(common, vif, sta, &ps_key); if (key > 0) an->ps_key = key; return 0; } static void ath9k_del_ps_key(struct ath_softc *sc, struct ieee80211_vif *vif, struct ieee80211_sta *sta) { struct ath_common *common = ath9k_hw_common(sc->sc_ah); struct ath_node *an = (struct ath_node *) sta->drv_priv; struct ieee80211_key_conf ps_key = { .hw_key_idx = an->ps_key }; if (!an->ps_key) return; ath_key_delete(common, &ps_key); an->ps_key = 0; } static int ath9k_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_sta *sta) { struct ath_softc *sc = hw->priv; ath9k_del_ps_key(sc, vif, sta); ath_node_detach(sc, sta); return 0; } static void ath9k_sta_notify(struct ieee80211_hw *hw, struct ieee80211_vif *vif, enum sta_notify_cmd cmd, struct ieee80211_sta *sta) { struct ath_softc *sc = hw->priv; struct ath_node *an = (struct ath_node *) sta->drv_priv; switch (cmd) { case STA_NOTIFY_SLEEP: an->sleeping = true; ath_tx_aggr_sleep(sta, sc, an); break; case STA_NOTIFY_AWAKE: an->sleeping = false; ath_tx_aggr_wakeup(sc, an); break; } } static int ath9k_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 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 >= IEEE80211_NUM_ACS) return 0; txq = sc->tx.txq_map[queue]; ath9k_ps_wakeup(sc); 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 * 32; ath_dbg(common, 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); ath_update_max_aggr_framelen(sc, queue, qi.tqi_burstTime); ret = ath_txq_update(sc, txq->axq_qnum, &qi); if (ret) ath_err(common, "TXQ Update failed\n"); mutex_unlock(&sc->mutex); ath9k_ps_restore(sc); 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; if ((vif->type == NL80211_IFTYPE_ADHOC || vif->type == NL80211_IFTYPE_MESH_POINT) && (key->cipher == WLAN_CIPHER_SUITE_TKIP || key->cipher == WLAN_CIPHER_SUITE_CCMP) && !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { /* * For now, disable hw crypto for the RSN IBSS group keys. This * could be optimized in the future to use a modified key cache * design to support per-STA RX GTK, but until that gets * implemented, use of software crypto for group addressed * frames is a acceptable to allow RSN IBSS to be used. */ return -EOPNOTSUPP; } mutex_lock(&sc->mutex); ath9k_ps_wakeup(sc); ath_dbg(common, CONFIG, "Set HW Key\n"); switch (cmd) { case SET_KEY: if (sta) ath9k_del_ps_key(sc, vif, sta); 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_TX; 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_set_assoc_state(struct ath_softc *sc, struct ieee80211_vif *vif) { struct ath_common *common = ath9k_hw_common(sc->sc_ah); struct ath_vif *avp = (void *)vif->drv_priv; struct ieee80211_bss_conf *bss_conf = &vif->bss_conf; unsigned long flags; set_bit(ATH_OP_PRIM_STA_VIF, &common->op_flags); avp->primary_sta_vif = true; /* * Set the AID, BSSID and do beacon-sync only when * the HW opmode is STATION. * * But the primary bit is set above in any case. */ if (sc->sc_ah->opmode != NL80211_IFTYPE_STATION) return; memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN); common->curaid = bss_conf->aid; ath9k_hw_write_associd(sc->sc_ah); common->last_rssi = ATH_RSSI_DUMMY_MARKER; sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER; spin_lock_irqsave(&sc->sc_pm_lock, flags); sc->ps_flags |= PS_BEACON_SYNC | PS_WAIT_FOR_BEACON; spin_unlock_irqrestore(&sc->sc_pm_lock, flags); if (ath9k_hw_mci_is_enabled(sc->sc_ah)) ath9k_mci_update_wlan_channels(sc, false); ath_dbg(common, CONFIG, "Primary Station interface: %pM, BSSID: %pM\n", vif->addr, common->curbssid); } static void ath9k_bss_assoc_iter(void *data, u8 *mac, struct ieee80211_vif *vif) { struct ath_softc *sc = data; struct ieee80211_bss_conf *bss_conf = &vif->bss_conf; struct ath_common *common = ath9k_hw_common(sc->sc_ah); if (test_bit(ATH_OP_PRIM_STA_VIF, &common->op_flags)) return; if (bss_conf->assoc) ath9k_set_assoc_state(sc, vif); } void ath9k_p2p_ps_timer(void *priv) { struct ath_softc *sc = priv; struct ath_vif *avp = sc->p2p_ps_vif; struct ieee80211_vif *vif; struct ieee80211_sta *sta; struct ath_node *an; u32 tsf; if (!avp) return; tsf = ath9k_hw_gettsf32(sc->sc_ah); if (!avp->noa.absent) tsf += ATH_P2P_PS_STOP_TIME; if (!avp->noa.has_next_tsf || avp->noa.next_tsf - tsf > BIT(31)) ieee80211_update_p2p_noa(&avp->noa, tsf); ath9k_update_p2p_ps_timer(sc, avp); rcu_read_lock(); vif = avp->vif; sta = ieee80211_find_sta(vif, vif->bss_conf.bssid); if (!sta) goto out; an = (void *) sta->drv_priv; if (an->sleeping == !!avp->noa.absent) goto out; an->sleeping = avp->noa.absent; if (an->sleeping) ath_tx_aggr_sleep(sta, sc, an); else ath_tx_aggr_wakeup(sc, an); out: rcu_read_unlock(); } void ath9k_update_p2p_ps(struct ath_softc *sc, struct ieee80211_vif *vif) { struct ath_vif *avp = (void *)vif->drv_priv; unsigned long flags; u32 tsf; if (!sc->p2p_ps_timer) return; if (vif->type != NL80211_IFTYPE_STATION || !vif->p2p) return; sc->p2p_ps_vif = avp; spin_lock_irqsave(&sc->sc_pm_lock, flags); if (!(sc->ps_flags & PS_BEACON_SYNC)) { tsf = ath9k_hw_gettsf32(sc->sc_ah); ieee80211_parse_p2p_noa(&vif->bss_conf.p2p_noa_attr, &avp->noa, tsf); ath9k_update_p2p_ps_timer(sc, avp); } spin_unlock_irqrestore(&sc->sc_pm_lock, flags); } static void ath9k_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ieee80211_bss_conf *bss_conf, u32 changed) { #define CHECK_ANI \ (BSS_CHANGED_ASSOC | \ BSS_CHANGED_IBSS | \ BSS_CHANGED_BEACON_ENABLED) 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 slottime; ath9k_ps_wakeup(sc); mutex_lock(&sc->mutex); if (changed & BSS_CHANGED_ASSOC) { ath_dbg(common, CONFIG, "BSSID %pM Changed ASSOC %d\n", bss_conf->bssid, bss_conf->assoc); if (avp->primary_sta_vif && !bss_conf->assoc) { clear_bit(ATH_OP_PRIM_STA_VIF, &common->op_flags); avp->primary_sta_vif = false; if (ah->opmode == NL80211_IFTYPE_STATION) clear_bit(ATH_OP_BEACONS, &common->op_flags); } ieee80211_iterate_active_interfaces_atomic( sc->hw, IEEE80211_IFACE_ITER_RESUME_ALL, ath9k_bss_assoc_iter, sc); if (!test_bit(ATH_OP_PRIM_STA_VIF, &common->op_flags) && ah->opmode == NL80211_IFTYPE_STATION) { memset(common->curbssid, 0, ETH_ALEN); common->curaid = 0; ath9k_hw_write_associd(sc->sc_ah); if (ath9k_hw_mci_is_enabled(sc->sc_ah)) ath9k_mci_update_wlan_channels(sc, true); } } if (changed & BSS_CHANGED_IBSS) { memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN); common->curaid = bss_conf->aid; ath9k_hw_write_associd(sc->sc_ah); } if ((changed & BSS_CHANGED_BEACON_ENABLED) || (changed & BSS_CHANGED_BEACON_INT)) ath9k_beacon_config(sc, vif, changed); 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); } } if (changed & BSS_CHANGED_P2P_PS) { spin_lock_bh(&sc->sc_pcu_lock); ath9k_update_p2p_ps(sc, vif); spin_unlock_bh(&sc->sc_pcu_lock); } if (changed & CHECK_ANI) ath_check_ani(sc); mutex_unlock(&sc->mutex); ath9k_ps_restore(sc); #undef CHECK_ANI } static u64 ath9k_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif) { 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, struct ieee80211_vif *vif, 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 ieee80211_vif *vif) { 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; bool flush = false; int ret = 0; mutex_lock(&sc->mutex); switch (action) { case IEEE80211_AMPDU_RX_START: break; case IEEE80211_AMPDU_RX_STOP: break; case IEEE80211_AMPDU_TX_START: 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_FLUSH: case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: flush = true; case IEEE80211_AMPDU_TX_STOP_CONT: ath9k_ps_wakeup(sc); ath_tx_aggr_stop(sc, sta, tid); if (!flush) 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"); } mutex_unlock(&sc->mutex); 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; int pos; if (config_enabled(CONFIG_ATH9K_TX99)) return -EOPNOTSUPP; spin_lock_bh(&common->cc_lock); 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_bh(&common->cc_lock); return -ENOENT; } chan = &sband->channels[idx]; pos = chan->hw_value; memcpy(survey, &sc->survey[pos], sizeof(*survey)); survey->channel = chan; spin_unlock_bh(&common->cc_lock); 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; if (config_enabled(CONFIG_ATH9K_TX99)) return; mutex_lock(&sc->mutex); ah->coverage_class = coverage_class; ath9k_ps_wakeup(sc); ath9k_hw_init_global_settings(ah); ath9k_ps_restore(sc); mutex_unlock(&sc->mutex); } static bool ath9k_has_tx_pending(struct ath_softc *sc) { int i, npend = 0; for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) { if (!ATH_TXQ_SETUP(sc, i)) continue; if (!sc->tx.txq[i].axq_depth) continue; npend = ath9k_has_pending_frames(sc, &sc->tx.txq[i]); if (npend) break; } return !!npend; } static void ath9k_flush(struct ieee80211_hw *hw, u32 queues, bool drop) { struct ath_softc *sc = hw->priv; struct ath_hw *ah = sc->sc_ah; struct ath_common *common = ath9k_hw_common(ah); int timeout = HZ / 5; /* 200 ms */ bool drain_txq; mutex_lock(&sc->mutex); cancel_delayed_work_sync(&sc->tx_complete_work); if (ah->ah_flags & AH_UNPLUGGED) { ath_dbg(common, ANY, "Device has been unplugged!\n"); mutex_unlock(&sc->mutex); return; } if (test_bit(ATH_OP_INVALID, &common->op_flags)) { ath_dbg(common, ANY, "Device not present\n"); mutex_unlock(&sc->mutex); return; } if (wait_event_timeout(sc->tx_wait, !ath9k_has_tx_pending(sc), timeout) > 0) drop = false; if (drop) { ath9k_ps_wakeup(sc); spin_lock_bh(&sc->sc_pcu_lock); drain_txq = ath_drain_all_txq(sc); spin_unlock_bh(&sc->sc_pcu_lock); if (!drain_txq) ath_reset(sc); ath9k_ps_restore(sc); ieee80211_wake_queues(hw); } ieee80211_queue_delayed_work(hw, &sc->tx_complete_work, 0); mutex_unlock(&sc->mutex); } static bool ath9k_tx_frames_pending(struct ieee80211_hw *hw) { struct ath_softc *sc = hw->priv; int i; for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) { if (!ATH_TXQ_SETUP(sc, i)) continue; if (ath9k_has_pending_frames(sc, &sc->tx.txq[i])) return true; } return false; } static int ath9k_tx_last_beacon(struct ieee80211_hw *hw) { struct ath_softc *sc = hw->priv; struct ath_hw *ah = sc->sc_ah; struct ieee80211_vif *vif; struct ath_vif *avp; struct ath_buf *bf; struct ath_tx_status ts; bool edma = !!(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA); int status; vif = sc->beacon.bslot[0]; if (!vif) return 0; if (!vif->bss_conf.enable_beacon) return 0; avp = (void *)vif->drv_priv; if (!sc->beacon.tx_processed && !edma) { tasklet_disable(&sc->bcon_tasklet); bf = avp->av_bcbuf; if (!bf || !bf->bf_mpdu) goto skip; status = ath9k_hw_txprocdesc(ah, bf->bf_desc, &ts); if (status == -EINPROGRESS) goto skip; sc->beacon.tx_processed = true; sc->beacon.tx_last = !(ts.ts_status & ATH9K_TXERR_MASK); skip: tasklet_enable(&sc->bcon_tasklet); } return sc->beacon.tx_last; } static int ath9k_get_stats(struct ieee80211_hw *hw, struct ieee80211_low_level_stats *stats) { struct ath_softc *sc = hw->priv; struct ath_hw *ah = sc->sc_ah; struct ath9k_mib_stats *mib_stats = &ah->ah_mibStats; stats->dot11ACKFailureCount = mib_stats->ackrcv_bad; stats->dot11RTSFailureCount = mib_stats->rts_bad; stats->dot11FCSErrorCount = mib_stats->fcs_bad; stats->dot11RTSSuccessCount = mib_stats->rts_good; return 0; } static u32 fill_chainmask(u32 cap, u32 new) { u32 filled = 0; int i; for (i = 0; cap && new; i++, cap >>= 1) { if (!(cap & BIT(0))) continue; if (new & BIT(0)) filled |= BIT(i); new >>= 1; } return filled; } static bool validate_antenna_mask(struct ath_hw *ah, u32 val) { if (AR_SREV_9300_20_OR_LATER(ah)) return true; switch (val & 0x7) { case 0x1: case 0x3: case 0x7: return true; case 0x2: return (ah->caps.rx_chainmask == 1); default: return false; } } static int ath9k_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant) { struct ath_softc *sc = hw->priv; struct ath_hw *ah = sc->sc_ah; if (ah->caps.rx_chainmask != 1) rx_ant |= tx_ant; if (!validate_antenna_mask(ah, rx_ant) || !tx_ant) return -EINVAL; sc->ant_rx = rx_ant; sc->ant_tx = tx_ant; if (ah->caps.rx_chainmask == 1) return 0; /* AR9100 runs into calibration issues if not all rx chains are enabled */ if (AR_SREV_9100(ah)) ah->rxchainmask = 0x7; else ah->rxchainmask = fill_chainmask(ah->caps.rx_chainmask, rx_ant); ah->txchainmask = fill_chainmask(ah->caps.tx_chainmask, tx_ant); ath9k_cmn_reload_chainmask(ah); return 0; } static int ath9k_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant) { struct ath_softc *sc = hw->priv; *tx_ant = sc->ant_tx; *rx_ant = sc->ant_rx; return 0; } static void ath9k_sw_scan_start(struct ieee80211_hw *hw) { struct ath_softc *sc = hw->priv; struct ath_common *common = ath9k_hw_common(sc->sc_ah); set_bit(ATH_OP_SCANNING, &common->op_flags); } static void ath9k_sw_scan_complete(struct ieee80211_hw *hw) { struct ath_softc *sc = hw->priv; struct ath_common *common = ath9k_hw_common(sc->sc_ah); clear_bit(ATH_OP_SCANNING, &common->op_flags); } static void ath9k_channel_switch_beacon(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct cfg80211_chan_def *chandef) { /* depend on vif->csa_active only */ return; } 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, .sta_notify = ath9k_sta_notify, .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, .tx_frames_pending = ath9k_tx_frames_pending, .tx_last_beacon = ath9k_tx_last_beacon, .release_buffered_frames = ath9k_release_buffered_frames, .get_stats = ath9k_get_stats, .set_antenna = ath9k_set_antenna, .get_antenna = ath9k_get_antenna, #ifdef CONFIG_ATH9K_WOW .suspend = ath9k_suspend, .resume = ath9k_resume, .set_wakeup = ath9k_set_wakeup, #endif #ifdef CONFIG_ATH9K_DEBUGFS .get_et_sset_count = ath9k_get_et_sset_count, .get_et_stats = ath9k_get_et_stats, .get_et_strings = ath9k_get_et_strings, #endif #if defined(CONFIG_MAC80211_DEBUGFS) && defined(CONFIG_ATH9K_STATION_STATISTICS) .sta_add_debugfs = ath9k_sta_add_debugfs, #endif .sw_scan_start = ath9k_sw_scan_start, .sw_scan_complete = ath9k_sw_scan_complete, .channel_switch_beacon = ath9k_channel_switch_beacon, };