diff options
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/main.c')
-rw-r--r-- | drivers/net/wireless/ath/ath9k/main.c | 810 |
1 files changed, 450 insertions, 360 deletions
diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c index 806748a..8d64c16 100644 --- a/drivers/net/wireless/ath/ath9k/main.c +++ b/drivers/net/wireless/ath/ath9k/main.c @@ -62,14 +62,12 @@ static bool ath9k_has_pending_frames(struct ath_softc *sc, struct ath_txq *txq) 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) +static bool ath9k_setpower(struct ath_softc *sc, enum ath9k_power_mode mode) { unsigned long flags; bool ret; @@ -113,30 +111,35 @@ void ath9k_ps_wakeup(struct ath_softc *sc) 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; - 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); + mode = 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); + mode = ATH9K_PM_NETWORK_SLEEP; + 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_start_ani(struct ath_common *common) +void ath_start_ani(struct ath_common *common) { struct ath_hw *ah = common->ah; unsigned long timestamp = jiffies_to_msecs(jiffies); @@ -165,7 +168,7 @@ static void ath_update_survey_nf(struct ath_softc *sc, int channel) if (chan->noisefloor) { survey->filled |= SURVEY_INFO_NOISE_DBM; - survey->noise = chan->noisefloor; + survey->noise = ath9k_hw_getchan_noise(ah, chan); } } @@ -214,103 +217,171 @@ static int ath_update_survey_stats(struct ath_softc *sc) 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) +static void __ath_cancel_work(struct ath_softc *sc) { - 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); +static void ath_cancel_work(struct ath_softc *sc) +{ + __ath_cancel_work(sc); + cancel_work_sync(&sc->hw_reset_work); +} - /* - * 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); +static bool ath_prepare_reset(struct ath_softc *sc, bool retry_tx, bool flush) +{ + struct ath_hw *ah = sc->sc_ah; + struct ath_common *common = ath9k_hw_common(ah); + bool ret = true; - if (!ath_stoprecv(sc)) - stopped = false; + ieee80211_stop_queues(sc->hw); - if (!ath9k_hw_check_alive(ah)) - stopped = false; + sc->hw_busy_count = 0; + del_timer_sync(&common->ani.timer); - /* XXX: do not flush receive queue here. We don't want - * to flush data frames already in queue because of - * changing channel. */ + ath9k_debug_samp_bb_mac(sc); + ath9k_hw_disable_interrupts(ah); - if (!stopped || !(sc->sc_flags & SC_OP_OFFCHANNEL)) - fastcc = false; + if (AR_SREV_9300_20_OR_LATER(ah)) { + ret &= ath_stoprecv(sc); + ret &= ath_drain_all_txq(sc, retry_tx); + } else { + ret &= ath_drain_all_txq(sc, retry_tx); + ret &= ath_stoprecv(sc); + } - if (!(sc->sc_flags & SC_OP_OFFCHANNEL)) - caldata = &sc->caldata; + if (!flush) { + if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) + ath_rx_tasklet(sc, 1, true); + ath_rx_tasklet(sc, 1, false); + } else { + ath_flushrecv(sc); + } - 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); + return ret; +} - 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; - } +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); if (ath_startrecv(sc) != 0) { ath_err(common, "Unable to restart recv logic\n"); - r = -EIO; - goto ps_restore; + return false; } ath9k_cmn_update_txpow(ah, sc->curtxpow, sc->config.txpowlimit, &sc->curtxpow); - ath9k_hw_set_interrupts(ah, ah->imask); + ath9k_hw_set_interrupts(ah); + ath9k_hw_enable_interrupts(ah); - if (!(sc->sc_flags & (SC_OP_OFFCHANNEL))) { + if (!(sc->sc_flags & (SC_OP_OFFCHANNEL)) && start) { if (sc->sc_flags & SC_OP_BEACONS) ath_set_beacon(sc); + 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); + if (!common->disable_ani) + ath_start_ani(common); } - ps_restore: - ieee80211_wake_queues(hw); + if ((ah->caps.hw_caps & ATH9K_HW_CAP_ANT_DIV_COMB) && sc->ant_rx != 3) { + struct ath_hw_antcomb_conf div_ant_conf; + u8 lna_conf; + + ath9k_hw_antdiv_comb_conf_get(ah, &div_ant_conf); + + if (sc->ant_rx == 1) + lna_conf = ATH_ANT_DIV_COMB_LNA1; + else + lna_conf = ATH_ANT_DIV_COMB_LNA2; + div_ant_conf.main_lna_conf = lna_conf; + div_ant_conf.alt_lna_conf = lna_conf; + + ath9k_hw_antdiv_comb_conf_set(ah, &div_ant_conf); + } + + ieee80211_wake_queues(sc->hw); + + return true; +} + +static int ath_reset_internal(struct ath_softc *sc, struct ath9k_channel *hchan, + bool retry_tx) +{ + 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; + bool flush = false; + int r; + + __ath_cancel_work(sc); + + spin_lock_bh(&sc->sc_pcu_lock); + + if (!(sc->sc_flags & SC_OP_OFFCHANNEL)) { + fastcc = false; + caldata = &sc->caldata; + } + + if (!hchan) { + fastcc = false; + flush = true; + hchan = ah->curchan; + } + + if (fastcc && !ath9k_hw_check_alive(ah)) + fastcc = false; + if (!ath_prepare_reset(sc, retry_tx, flush)) + fastcc = false; + + ath_dbg(common, ATH_DBG_CONFIG, + "Reset to %u MHz, HT40: %d fastcc: %d\n", + hchan->channel, !!(hchan->channelFlags & (CHANNEL_HT40MINUS | + CHANNEL_HT40PLUS)), + fastcc); + + r = ath9k_hw_reset(ah, hchan, caldata, fastcc); + if (r) { + ath_err(common, + "Unable to reset channel, reset status %d\n", r); + goto out; + } + + if (!ath_complete_reset(sc, true)) + r = -EIO; + +out: spin_unlock_bh(&sc->sc_pcu_lock); + 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 ieee80211_hw *hw, + struct ath9k_channel *hchan) +{ + int r; + + if (sc->sc_flags & SC_OP_INVALID) + return -EIO; + + ath9k_ps_wakeup(sc); + + r = ath_reset_internal(sc, hchan, false); ath9k_ps_restore(sc); + return r; } @@ -318,7 +389,6 @@ 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) @@ -327,7 +397,7 @@ static void ath_paprd_activate(struct ath_softc *sc) ath9k_ps_wakeup(sc); ar9003_paprd_enable(ah, false); for (chain = 0; chain < AR9300_MAX_CHAINS; chain++) { - if (!(common->tx_chainmask & BIT(chain))) + if (!(ah->txchainmask & BIT(chain))) continue; ar9003_paprd_populate_single_table(ah, caldata, chain); @@ -361,7 +431,7 @@ static bool ath_paprd_send_frame(struct ath_softc *sc, struct sk_buff *skb, int txctl.paprd = BIT(chain); if (ath_tx_start(hw, skb, &txctl) != 0) { - ath_dbg(common, ATH_DBG_XMIT, "PAPRD TX failed\n"); + ath_dbg(common, ATH_DBG_CALIBRATE, "PAPRD TX failed\n"); dev_kfree_skb_any(skb); return false; } @@ -370,7 +440,7 @@ static bool ath_paprd_send_frame(struct ath_softc *sc, struct sk_buff *skb, int msecs_to_jiffies(ATH_PAPRD_TIMEOUT)); if (!time_left) - ath_dbg(ath9k_hw_common(sc->sc_ah), ATH_DBG_CALIBRATE, + ath_dbg(common, ATH_DBG_CALIBRATE, "Timeout waiting for paprd training on TX chain %d\n", chain); @@ -394,12 +464,14 @@ void ath_paprd_calibrate(struct work_struct *work) if (!caldata) return; + ath9k_ps_wakeup(sc); + if (ar9003_paprd_init_table(ah) < 0) - return; + goto fail_paprd; skb = alloc_skb(len, GFP_KERNEL); if (!skb) - return; + goto fail_paprd; skb_put(skb, len); memset(skb->data, 0, len); @@ -411,9 +483,8 @@ void ath_paprd_calibrate(struct work_struct *work) 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))) + if (!(ah->txchainmask & BIT(chain))) continue; chain_ok = 0; @@ -431,11 +502,18 @@ void ath_paprd_calibrate(struct work_struct *work) if (!ath_paprd_send_frame(sc, skb, chain)) goto fail_paprd; - if (!ar9003_paprd_is_done(ah)) + if (!ar9003_paprd_is_done(ah)) { + ath_dbg(common, ATH_DBG_CALIBRATE, + "PAPRD not yet done on chain %d\n", chain); break; + } - if (ar9003_paprd_create_curve(ah, caldata, chain) != 0) + if (ar9003_paprd_create_curve(ah, caldata, chain)) { + ath_dbg(common, ATH_DBG_CALIBRATE, + "PAPRD create curve failed on chain %d\n", + chain); break; + } chain_ok = 1; } @@ -515,24 +593,19 @@ void ath_ani_calibrate(unsigned long data) 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); - } + /* 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); - } + /* Perform calibration if necessary */ + if (longcal || shortcal) { + common->ani.caldone = + ath9k_hw_calibrate(ah, ah->curchan, + ah->rxchainmask, longcal); } ath9k_ps_restore(sc); @@ -543,6 +616,7 @@ set_timer: * The interval must be the shortest necessary to satisfy ANI, * short calibration and long calibration. */ + ath9k_debug_samp_bb_mac(sc); cal_interval = ATH_LONG_CALINTERVAL; if (sc->sc_ah->config.enable_ani) cal_interval = min(cal_interval, @@ -562,7 +636,6 @@ set_timer: 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 @@ -571,9 +644,6 @@ static void ath_node_attach(struct ath_softc *sc, struct ieee80211_sta *sta) 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 + @@ -597,78 +667,6 @@ static void ath_node_detach(struct ath_softc *sc, struct ieee80211_sta *sta) 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); -} - -static void ath_hw_pll_rx_hang_check(struct ath_softc *sc, u32 pll_sqsum) -{ - static int count; - struct ath_common *common = ath9k_hw_common(sc->sc_ah); - - if (pll_sqsum >= 0x40000) { - count++; - if (count == 3) { - /* Rx is hung for more than 500ms. Reset it */ - ath_dbg(common, ATH_DBG_RESET, - "Possible RX hang, resetting"); - ath_reset(sc, true); - count = 0; - } - } else - count = 0; -} - -void ath_hw_pll_work(struct work_struct *work) -{ - struct ath_softc *sc = container_of(work, struct ath_softc, - hw_pll_work.work); - u32 pll_sqsum; - - /* - * ensure that the PLL WAR is executed only - * after the STA is associated (or) if the - * beaconing had started in interfaces that - * uses beacons. - */ - if (!(sc->sc_flags & SC_OP_BEACONS)) - return; - - if (AR_SREV_9485(sc->sc_ah)) { - - ath9k_ps_wakeup(sc); - pll_sqsum = ar9003_get_pll_sqsum_dvc(sc->sc_ah); - ath9k_ps_restore(sc); - - ath_hw_pll_rx_hang_check(sc, pll_sqsum); - - ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work, HZ/5); - } -} - void ath9k_tasklet(unsigned long data) { @@ -679,14 +677,24 @@ void ath9k_tasklet(unsigned long data) u32 status = sc->intrstatus; u32 rxmask; + ath9k_ps_wakeup(sc); + spin_lock(&sc->sc_pcu_lock); + if ((status & ATH9K_INT_FATAL) || (status & ATH9K_INT_BB_WATCHDOG)) { - ath_reset(sc, true); - return; - } +#ifdef CONFIG_ATH9K_DEBUGFS + enum ath_reset_type type; - ath9k_ps_wakeup(sc); - spin_lock(&sc->sc_pcu_lock); + if (status & ATH9K_INT_FATAL) + type = RESET_TYPE_FATAL_INT; + else + type = RESET_TYPE_BB_WATCHDOG; + + RESET_STAT_INC(sc, type); +#endif + ieee80211_queue_work(sc->hw, &sc->hw_reset_work); + goto out; + } /* * Only run the baseband hang check if beacons stop working in AP or @@ -706,8 +714,7 @@ void ath9k_tasklet(unsigned long data) */ ath_dbg(common, ATH_DBG_PS, "TSFOOR - Sync with next Beacon\n"); - sc->ps_flags |= PS_WAIT_FOR_BEACON | PS_BEACON_SYNC | - PS_TSFOOR_SYNC; + sc->ps_flags |= PS_WAIT_FOR_BEACON | PS_BEACON_SYNC; } if (ah->caps.hw_caps & ATH9K_HW_CAP_EDMA) @@ -736,6 +743,7 @@ void ath9k_tasklet(unsigned long data) if (status & ATH9K_INT_GENTIMER) ath_gen_timer_isr(sc->sc_ah); +out: /* re-enable hardware interrupt */ ath9k_hw_enable_interrupts(ah); @@ -826,11 +834,9 @@ irqreturn_t ath_isr(int irq, void *dev) 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_RXEOL) { + ah->imask &= ~(ATH9K_INT_RXEOL | ATH9K_INT_RXORN); + ath9k_hw_set_interrupts(ah); } if (status & ATH9K_INT_MIB) { @@ -877,7 +883,7 @@ chip_reset: #undef SCHED_INTR } -void ath_radio_enable(struct ath_softc *sc, struct ieee80211_hw *hw) +static 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); @@ -886,8 +892,9 @@ void ath_radio_enable(struct ath_softc *sc, struct ieee80211_hw *hw) ath9k_ps_wakeup(sc); spin_lock_bh(&sc->sc_pcu_lock); + atomic_set(&ah->intr_ref_cnt, -1); - ath9k_hw_configpcipowersave(ah, 0, 0); + ath9k_hw_configpcipowersave(ah, false); if (!ah->curchan) ah->curchan = ath9k_cmn_get_curchannel(sc->hw, ah); @@ -899,27 +906,13 @@ void ath_radio_enable(struct ath_softc *sc, struct ieee80211_hw *hw) 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_set_beacon(sc); /* restart beacons */ - - /* Re-Enable interrupts */ - ath9k_hw_set_interrupts(ah, ah->imask); + ath_complete_reset(sc, true); /* 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); @@ -932,11 +925,10 @@ void ath_radio_disable(struct ath_softc *sc, struct ieee80211_hw *hw) int r; ath9k_ps_wakeup(sc); - cancel_delayed_work_sync(&sc->hw_pll_work); - spin_lock_bh(&sc->sc_pcu_lock); + ath_cancel_work(sc); - ieee80211_stop_queues(hw); + spin_lock_bh(&sc->sc_pcu_lock); /* * Keep the LED on when the radio is disabled @@ -947,13 +939,7 @@ void ath_radio_disable(struct ath_softc *sc, struct ieee80211_hw *hw) 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 */ + ath_prepare_reset(sc, false, true); if (!ah->curchan) ah->curchan = ath9k_cmn_get_curchannel(hw, ah); @@ -967,55 +953,19 @@ void ath_radio_disable(struct ath_softc *sc, struct ieee80211_hw *hw) ath9k_hw_phy_disable(ah); - ath9k_hw_configpcipowersave(ah, 1, 1); + ath9k_hw_configpcipowersave(ah, true); spin_unlock_bh(&sc->sc_pcu_lock); ath9k_ps_restore(sc); } -int ath_reset(struct ath_softc *sc, bool retry_tx) +static 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_set_beacon(sc); /* restart beacons */ - - ath9k_hw_set_interrupts(ah, ah->imask); + r = ath_reset_internal(sc, NULL, retry_tx); if (retry_tx) { int i; @@ -1028,16 +978,94 @@ int ath_reset(struct ath_softc *sc, bool retry_tx) } } - ieee80211_wake_queues(hw); - spin_unlock_bh(&sc->sc_pcu_lock); - - /* Start ANI */ - ath_start_ani(common); ath9k_ps_restore(sc); return r; } +void ath_reset_work(struct work_struct *work) +{ + struct ath_softc *sc = container_of(work, struct ath_softc, hw_reset_work); + + ath_reset(sc, true); +} + +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) { + RESET_STAT_INC(sc, RESET_TYPE_BB_HANG); + ieee80211_queue_work(sc->hw, &sc->hw_reset_work); + } + + } else if (busy >= 0) + sc->hw_busy_count = 0; + +out: + ath9k_ps_restore(sc); +} + +static void ath_hw_pll_rx_hang_check(struct ath_softc *sc, u32 pll_sqsum) +{ + static int count; + struct ath_common *common = ath9k_hw_common(sc->sc_ah); + + if (pll_sqsum >= 0x40000) { + count++; + if (count == 3) { + /* Rx is hung for more than 500ms. Reset it */ + ath_dbg(common, ATH_DBG_RESET, + "Possible RX hang, resetting"); + RESET_STAT_INC(sc, RESET_TYPE_PLL_HANG); + ieee80211_queue_work(sc->hw, &sc->hw_reset_work); + count = 0; + } + } else + count = 0; +} + +void ath_hw_pll_work(struct work_struct *work) +{ + struct ath_softc *sc = container_of(work, struct ath_softc, + hw_pll_work.work); + u32 pll_sqsum; + + /* + * ensure that the PLL WAR is executed only + * after the STA is associated (or) if the + * beaconing had started in interfaces that + * uses beacons. + */ + if (!(sc->sc_flags & SC_OP_BEACONS)) + return; + + if (AR_SREV_9485(sc->sc_ah)) { + + ath9k_ps_wakeup(sc); + pll_sqsum = ar9003_get_pll_sqsum_dvc(sc->sc_ah); + ath9k_ps_restore(sc); + + ath_hw_pll_rx_hang_check(sc, pll_sqsum); + + ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work, HZ/5); + } +} + /**********************/ /* mac80211 callbacks */ /**********************/ @@ -1065,7 +1093,7 @@ static int ath9k_start(struct ieee80211_hw *hw) init_channel = ath9k_cmn_get_curchannel(hw, ah); /* Reset SERDES registers */ - ath9k_hw_configpcipowersave(ah, 0, 0); + ath9k_hw_configpcipowersave(ah, false); /* * The basic interface to setting the hardware in a good @@ -1084,28 +1112,6 @@ static int ath9k_start(struct ieee80211_hw *hw) 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 | @@ -1128,11 +1134,14 @@ static int ath9k_start(struct ieee80211_hw *hw) /* 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); + if (!ath_complete_reset(sc, false)) { + r = -EIO; + spin_unlock_bh(&sc->sc_pcu_lock); + goto mutex_unlock; + } - ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, 0); + spin_unlock_bh(&sc->sc_pcu_lock); if ((ah->btcoex_hw.scheme != ATH_BTCOEX_CFG_NONE) && !ah->btcoex_hw.enabled) { @@ -1140,8 +1149,6 @@ static int ath9k_start(struct ieee80211_hw *hw) 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); } @@ -1227,10 +1234,7 @@ static void ath9k_stop(struct ieee80211_hw *hw) 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); + ath_cancel_work(sc); if (sc->sc_flags & SC_OP_INVALID) { ath_dbg(common, ATH_DBG_ANY, "Device not present\n"); @@ -1270,7 +1274,6 @@ static void ath9k_stop(struct ieee80211_hw *hw) /* 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); @@ -1357,8 +1360,9 @@ void ath9k_calculate_iter_data(struct ieee80211_hw *hw, 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. + * 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)); iter_data->hw_macaddr = common->macaddr; @@ -1418,13 +1422,17 @@ static void ath9k_calculate_summary_state(struct ieee80211_hw *hw, ah->imask &= ~ATH9K_INT_TSFOOR; } - ath9k_hw_set_interrupts(ah, ah->imask); + ath9k_hw_set_interrupts(ah); /* Set up ANI */ - if ((iter_data.naps + iter_data.nadhocs) > 0) { + if (iter_data.naps > 0) { sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER; - sc->sc_flags |= SC_OP_ANI_RUN; - ath_start_ani(common); + + if (!common->disable_ani) { + 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); @@ -1491,15 +1499,6 @@ static int ath9k_add_interface(struct ieee80211_hw *hw, } } - if ((ah->opmode == NL80211_IFTYPE_ADHOC) || - ((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); @@ -1589,7 +1588,7 @@ static void ath9k_enable_ps(struct ath_softc *sc) 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_set_interrupts(ah); } ath9k_hw_setrxabort(ah, 1); } @@ -1609,7 +1608,7 @@ static void ath9k_disable_ps(struct ath_softc *sc) 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); + ath9k_hw_set_interrupts(ah); } } @@ -1688,14 +1687,14 @@ static int ath9k_config(struct ieee80211_hw *hw, u32 changed) "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); + ath9k_cmn_update_ichannel(&sc->sc_ah->channels[pos], + curchan, conf->channel_type); + /* * If the operating channel changes, change the survey in-use flags * along with it. @@ -1847,8 +1846,7 @@ static void ath9k_sta_notify(struct ieee80211_hw *hw, switch (cmd) { case STA_NOTIFY_SLEEP: an->sleeping = true; - if (ath_tx_aggr_sleep(sc, an)) - ieee80211_sta_set_tim(sta); + ath_tx_aggr_sleep(sta, sc, an); break; case STA_NOTIFY_AWAKE: an->sleeping = false; @@ -1857,7 +1855,8 @@ static void ath9k_sta_notify(struct ieee80211_hw *hw, } } -static int ath9k_conf_tx(struct ieee80211_hw *hw, u16 queue, +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; @@ -1968,50 +1967,38 @@ static void ath9k_bss_iter(void *data, u8 *mac, struct ieee80211_vif *vif) struct ieee80211_bss_conf *bss_conf = &vif->bss_conf; struct ath_vif *avp = (void *)vif->drv_priv; - switch (sc->sc_ah->opmode) { - case NL80211_IFTYPE_ADHOC: - /* There can be only one vif available */ + /* + * Skip iteration if primary station vif's bss info + * was not changed + */ + if (sc->sc_flags & SC_OP_PRIM_STA_VIF) + return; + + if (bss_conf->assoc) { + sc->sc_flags |= SC_OP_PRIM_STA_VIF; + avp->primary_sta_vif = true; memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN); common->curaid = bss_conf->aid; ath9k_hw_write_associd(sc->sc_ah); - /* configure beacon */ - if (bss_conf->enable_beacon) - ath_beacon_config(sc, vif); - break; - case NL80211_IFTYPE_STATION: - /* - * Skip iteration if primary station vif's bss info - * was not changed - */ - if (sc->sc_flags & SC_OP_PRIM_STA_VIF) - break; - - if (bss_conf->assoc) { - sc->sc_flags |= SC_OP_PRIM_STA_VIF; - avp->primary_sta_vif = true; - memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN); - common->curaid = bss_conf->aid; - ath9k_hw_write_associd(sc->sc_ah); - ath_dbg(common, ATH_DBG_CONFIG, + ath_dbg(common, ATH_DBG_CONFIG, "Bss Info ASSOC %d, bssid: %pM\n", bss_conf->aid, common->curbssid); - ath_beacon_config(sc, vif); - /* - * 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 | PS_WAIT_FOR_BEACON; - /* Reset rssi stats */ - sc->last_rssi = ATH_RSSI_DUMMY_MARKER; - sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER; + ath_beacon_config(sc, vif); + /* + * 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 | PS_WAIT_FOR_BEACON; + /* Reset rssi stats */ + sc->last_rssi = ATH_RSSI_DUMMY_MARKER; + sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER; + if (!common->disable_ani) { sc->sc_flags |= SC_OP_ANI_RUN; ath_start_ani(common); } - break; - default: - break; + } } @@ -2021,6 +2008,9 @@ static void ath9k_config_bss(struct ath_softc *sc, struct ieee80211_vif *vif) struct ieee80211_bss_conf *bss_conf = &vif->bss_conf; struct ath_vif *avp = (void *)vif->drv_priv; + if (sc->sc_ah->opmode != NL80211_IFTYPE_STATION) + return; + /* Reconfigure bss info */ if (avp->primary_sta_vif && !bss_conf->assoc) { ath_dbg(common, ATH_DBG_CONFIG, @@ -2039,12 +2029,12 @@ static void ath9k_config_bss(struct ath_softc *sc, struct ieee80211_vif *vif) * None of station vifs are associated. * Clear bssid & aid */ - if ((sc->sc_ah->opmode == NL80211_IFTYPE_STATION) && - !(sc->sc_flags & SC_OP_PRIM_STA_VIF)) { + if (!(sc->sc_flags & SC_OP_PRIM_STA_VIF)) { ath9k_hw_write_associd(sc->sc_ah); /* Stop ANI */ sc->sc_flags &= ~SC_OP_ANI_RUN; del_timer_sync(&common->ani.timer); + memset(&sc->caldata, 0, sizeof(sc->caldata)); } } @@ -2070,6 +2060,26 @@ static void ath9k_bss_info_changed(struct ieee80211_hw *hw, common->curbssid, common->curaid); } + if (changed & BSS_CHANGED_IBSS) { + /* There can be only one vif available */ + memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN); + common->curaid = bss_conf->aid; + ath9k_hw_write_associd(sc->sc_ah); + + if (bss_conf->ibss_joined) { + sc->sc_ah->stats.avgbrssi = ATH_RSSI_DUMMY_MARKER; + + if (!common->disable_ani) { + 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); + } + } + /* Enable transmission of beacons (AP, IBSS, MESH) */ if ((changed & BSS_CHANGED_BEACON) || ((changed & BSS_CHANGED_BEACON_ENABLED) && bss_conf->enable_beacon)) { @@ -2146,7 +2156,7 @@ static void ath9k_bss_info_changed(struct ieee80211_hw *hw, ath9k_ps_restore(sc); } -static u64 ath9k_get_tsf(struct ieee80211_hw *hw) +static u64 ath9k_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif) { struct ath_softc *sc = hw->priv; u64 tsf; @@ -2160,7 +2170,9 @@ static u64 ath9k_get_tsf(struct ieee80211_hw *hw) return tsf; } -static void ath9k_set_tsf(struct ieee80211_hw *hw, u64 tsf) +static void ath9k_set_tsf(struct ieee80211_hw *hw, + struct ieee80211_vif *vif, + u64 tsf) { struct ath_softc *sc = hw->priv; @@ -2171,7 +2183,7 @@ static void ath9k_set_tsf(struct ieee80211_hw *hw, u64 tsf) mutex_unlock(&sc->mutex); } -static void ath9k_reset_tsf(struct ieee80211_hw *hw) +static void ath9k_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif) { struct ath_softc *sc = hw->priv; @@ -2296,6 +2308,12 @@ static void ath9k_flush(struct ieee80211_hw *hw, bool drop) mutex_lock(&sc->mutex); cancel_delayed_work_sync(&sc->tx_complete_work); + if (ah->ah_flags & AH_UNPLUGGED) { + ath_dbg(common, ATH_DBG_ANY, "Device has been unplugged!\n"); + mutex_unlock(&sc->mutex); + return; + } + if (sc->sc_flags & SC_OP_INVALID) { ath_dbg(common, ATH_DBG_ANY, "Device not present\n"); mutex_unlock(&sc->mutex); @@ -2329,8 +2347,10 @@ static void ath9k_flush(struct ieee80211_hw *hw, bool drop) spin_lock_bh(&sc->sc_pcu_lock); drain_txq = ath_drain_all_txq(sc, false); spin_unlock_bh(&sc->sc_pcu_lock); + if (!drain_txq) ath_reset(sc, false); + ath9k_ps_restore(sc); ieee80211_wake_queues(hw); @@ -2354,7 +2374,7 @@ static bool ath9k_tx_frames_pending(struct ieee80211_hw *hw) return false; } -int ath9k_tx_last_beacon(struct ieee80211_hw *hw) +static int ath9k_tx_last_beacon(struct ieee80211_hw *hw) { struct ath_softc *sc = hw->priv; struct ath_hw *ah = sc->sc_ah; @@ -2393,6 +2413,73 @@ skip: 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 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 (!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_reload_chainmask_settings(sc); + + 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; +} + struct ieee80211_ops ath9k_ops = { .tx = ath9k_tx, .start = ath9k_start, @@ -2417,5 +2504,8 @@ struct ieee80211_ops ath9k_ops = { .set_coverage_class = ath9k_set_coverage_class, .flush = ath9k_flush, .tx_frames_pending = ath9k_tx_frames_pending, - .tx_last_beacon = ath9k_tx_last_beacon, + .tx_last_beacon = ath9k_tx_last_beacon, + .get_stats = ath9k_get_stats, + .set_antenna = ath9k_set_antenna, + .get_antenna = ath9k_get_antenna, }; 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