int rt2x00mac_set_tim(struct ieee80211_hw *hw, struct ieee80211_sta *sta, bool set) { struct rt2x00_dev *rt2x00dev = hw->priv; if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags)) return 0; ieee80211_iterate_active_interfaces_atomic(rt2x00dev->hw, rt2x00mac_set_tim_iter, rt2x00dev); /* queue work to upodate the beacon template */ ieee80211_queue_work(rt2x00dev->hw, &rt2x00dev->intf_work); return 0; }
static void p54spi_op_tx(struct ieee80211_hw *dev, struct sk_buff *skb) { struct p54s_priv *priv = dev->priv; struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); struct p54_tx_info *mi = (struct p54_tx_info *) info->rate_driver_data; struct p54s_tx_info *di = (struct p54s_tx_info *) mi->data; unsigned long flags; BUILD_BUG_ON(sizeof(*di) > sizeof((mi->data))); spin_lock_irqsave(&priv->tx_lock, flags); list_add_tail(&di->tx_list, &priv->tx_pending); spin_unlock_irqrestore(&priv->tx_lock, flags); ieee80211_queue_work(priv->hw, &priv->work); }
/* * Checks if the BB/MAC is hung. */ 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; u8 is_alive, nbeacon = 1; ath9k_ps_wakeup(sc); is_alive = ath9k_hw_check_alive(sc->sc_ah); if (is_alive && !AR_SREV_9300(sc->sc_ah)) goto out; else if (!is_alive && AR_SREV_9300(sc->sc_ah)) { ath_dbg(common, RESET, "DCU stuck is detected. Schedule chip reset\n"); RESET_STAT_INC(sc, RESET_TYPE_MAC_HANG); goto sched_reset; } spin_lock_irqsave(&common->cc_lock, flags); busy = ath_update_survey_stats(sc); spin_unlock_irqrestore(&common->cc_lock, flags); ath_dbg(common, 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); goto sched_reset; } } else if (busy >= 0) { sc->hw_busy_count = 0; nbeacon = 3; } ath_start_rx_poll(sc, nbeacon); goto out; sched_reset: ieee80211_queue_work(sc->hw, &sc->hw_reset_work); out: ath9k_ps_restore(sc); }
void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, u16 tid) { struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); struct ieee80211_local *local = sdata->local; struct ieee80211_ra_tid *ra_tid; struct sk_buff *skb = dev_alloc_skb(0); if (unlikely(!skb)) return; ra_tid = (struct ieee80211_ra_tid *) &skb->cb; memcpy(&ra_tid->ra, ra, ETH_ALEN); ra_tid->tid = tid; skb->pkt_type = IEEE80211_SDATA_QUEUE_AGG_STOP; skb_queue_tail(&sdata->skb_queue, skb); ieee80211_queue_work(&local->hw, &sdata->work); }
/* * PLL-WAR for AR9485/AR9340 */ static bool 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) { ath_dbg(common, RESET, "PLL WAR, resetting the chip\n"); RESET_STAT_INC(sc, RESET_TYPE_PLL_HANG); ieee80211_queue_work(sc->hw, &sc->hw_reset_work); count = 0; return true; } } else { count = 0; } return false; }
static irqreturn_t wl1271_irq(int irq, void *cookie) { struct wl1271 *wl = cookie; unsigned long flags; wl1271_debug(DEBUG_IRQ, "IRQ"); /* complete the ELP completion */ spin_lock_irqsave(&wl->wl_lock, flags); if (wl->elp_compl) { complete(wl->elp_compl); wl->elp_compl = NULL; } if (!test_and_set_bit(WL1271_FLAG_IRQ_RUNNING, &wl->flags)) ieee80211_queue_work(wl->hw, &wl->irq_work); set_bit(WL1271_FLAG_IRQ_PENDING, &wl->flags); spin_unlock_irqrestore(&wl->wl_lock, flags); return IRQ_HANDLED; }
int ieee80211_stop_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid) { struct sta_info *sta = container_of(pubsta, struct sta_info, sta); struct ieee80211_sub_if_data *sdata = sta->sdata; struct ieee80211_local *local = sdata->local; struct tid_ampdu_tx *tid_tx; int ret = 0; trace_api_stop_tx_ba_session(pubsta, tid); if (!local->ops->ampdu_action) return -EINVAL; if (tid >= IEEE80211_NUM_TIDS) return -EINVAL; spin_lock_bh(&sta->lock); tid_tx = rcu_dereference_protected_tid_tx(sta, tid); if (!tid_tx) { ret = -ENOENT; goto unlock; } WARN(sta->reserved_tid == tid, "Requested to stop BA session on reserved tid=%d", tid); if (test_bit(HT_AGG_STATE_STOPPING, &tid_tx->state)) { /* already in progress stopping it */ ret = 0; goto unlock; } set_bit(HT_AGG_STATE_WANT_STOP, &tid_tx->state); ieee80211_queue_work(&local->hw, &sta->ampdu_mlme.work); unlock: spin_unlock_bh(&sta->lock); return ret; }
void wl1271_scan_complete_work(struct work_struct *work) { struct delayed_work *dwork; struct wl1271 *wl; dwork = container_of(work, struct delayed_work, work); wl = container_of(dwork, struct wl1271, scan_complete_work); wl1271_debug(DEBUG_SCAN, "Scanning complete"); mutex_lock(&wl->mutex); if (wl->state == WL1271_STATE_OFF) goto out; if (wl->scan.state == WL1271_SCAN_STATE_IDLE) goto out; wl->scan.state = WL1271_SCAN_STATE_IDLE; memset(wl->scan.scanned_ch, 0, sizeof(wl->scan.scanned_ch)); wl->scan.req = NULL; ieee80211_scan_completed(wl->hw, false); /* restore hardware connection monitoring template */ if (test_bit(WL1271_FLAG_STA_ASSOCIATED, &wl->flags)) { if (wl1271_ps_elp_wakeup(wl) == 0) { wl1271_cmd_build_ap_probe_req(wl, wl->probereq); wl1271_ps_elp_sleep(wl); } } if (wl->scan.failed) { wl1271_info("Scan completed due to error."); ieee80211_queue_work(wl->hw, &wl->recovery_work); } out: mutex_unlock(&wl->mutex); }
/* * TX polling - checks if the TX engine is stuck somewhere * and issues a chip reset if so. */ void ath_tx_complete_poll_work(struct work_struct *work) { struct ath_softc *sc = container_of(work, struct ath_softc, tx_complete_work.work); struct ath_txq *txq; int i; bool needreset = false; #ifdef CONFIG_ATH9K_DEBUGFS sc->tx_complete_poll_work_seen++; #endif for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++) if (ATH_TXQ_SETUP(sc, i)) { txq = &sc->tx.txq[i]; ath_txq_lock(sc, txq); if (txq->axq_depth) { if (txq->axq_tx_inprogress) { needreset = true; ath_txq_unlock(sc, txq); break; } else { txq->axq_tx_inprogress = true; } } ath_txq_unlock_complete(sc, txq); } if (needreset) { ath_dbg(ath9k_hw_common(sc->sc_ah), RESET, "tx hung, resetting the chip\n"); RESET_STAT_INC(sc, RESET_TYPE_TX_HANG); ieee80211_queue_work(sc->hw, &sc->hw_reset_work); return; } ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, msecs_to_jiffies(ATH_TX_COMPLETE_POLL_INT)); }
int ieee80211_stop_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid) { struct sta_info *sta = container_of(pubsta, struct sta_info, sta); struct ieee80211_sub_if_data *sdata = sta->sdata; struct ieee80211_local *local = sdata->local; struct tid_ampdu_tx *tid_tx; int ret = 0; trace_api_stop_tx_ba_session(pubsta, tid); if (!local->ops->ampdu_action) return -EINVAL; if (tid >= STA_TID_NUM) return -EINVAL; spin_lock_bh(&sta->lock); tid_tx = sta->ampdu_mlme.tid_tx[tid]; if (!tid_tx) { ret = -ENOENT; goto unlock; } if (test_bit(HT_AGG_STATE_STOPPING, &tid_tx->state)) { /* already in progress stopping it */ ret = 0; goto unlock; } set_bit(HT_AGG_STATE_WANT_STOP, &tid_tx->state); ieee80211_queue_work(&local->hw, &sta->ampdu_mlme.work); unlock: spin_unlock_bh(&sta->lock); return ret; }
void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, u16 tid) { struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); struct ieee80211_local *local = sdata->local; struct ieee80211_ra_tid *ra_tid; struct sk_buff *skb = dev_alloc_skb(0); if (unlikely(!skb)) { #ifdef CONFIG_MAC80211_HT_DEBUG if (net_ratelimit()) printk(KERN_WARNING "%s: Not enough memory, " "dropping stop BA session", sdata->name); #endif return; } ra_tid = (struct ieee80211_ra_tid *) &skb->cb; memcpy(&ra_tid->ra, ra, ETH_ALEN); ra_tid->tid = tid; skb->pkt_type = IEEE80211_SDATA_QUEUE_AGG_STOP; skb_queue_tail(&sdata->skb_queue, skb); ieee80211_queue_work(&local->hw, &sdata->work); }
int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid, enum ieee80211_agg_stop_reason reason) { struct ieee80211_local *local = sta->local; struct tid_ampdu_tx *tid_tx; struct ieee80211_ampdu_params params = { .sta = &sta->sta, .tid = tid, .buf_size = 0, .amsdu = false, .timeout = 0, .ssn = 0, }; int ret; lockdep_assert_held(&sta->ampdu_mlme.mtx); switch (reason) { case AGG_STOP_DECLINED: case AGG_STOP_LOCAL_REQUEST: case AGG_STOP_PEER_REQUEST: params.action = IEEE80211_AMPDU_TX_STOP_CONT; break; case AGG_STOP_DESTROY_STA: params.action = IEEE80211_AMPDU_TX_STOP_FLUSH; break; default: WARN_ON_ONCE(1); return -EINVAL; } spin_lock_bh(&sta->lock); /* free struct pending for start, if present */ tid_tx = sta->ampdu_mlme.tid_start_tx[tid]; kfree(tid_tx); sta->ampdu_mlme.tid_start_tx[tid] = NULL; tid_tx = rcu_dereference_protected_tid_tx(sta, tid); if (!tid_tx) { spin_unlock_bh(&sta->lock); return -ENOENT; } /* * if we're already stopping ignore any new requests to stop * unless we're destroying it in which case notify the driver */ if (test_bit(HT_AGG_STATE_STOPPING, &tid_tx->state)) { spin_unlock_bh(&sta->lock); if (reason != AGG_STOP_DESTROY_STA) return -EALREADY; params.action = IEEE80211_AMPDU_TX_STOP_FLUSH_CONT; ret = drv_ampdu_action(local, sta->sdata, ¶ms); WARN_ON_ONCE(ret); return 0; } if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) { /* not even started yet! */ ieee80211_assign_tid_tx(sta, tid, NULL); spin_unlock_bh(&sta->lock); kfree_rcu(tid_tx, rcu_head); return 0; } set_bit(HT_AGG_STATE_STOPPING, &tid_tx->state); spin_unlock_bh(&sta->lock); ht_dbg(sta->sdata, "Tx BA session stop requested for %pM tid %u\n", sta->sta.addr, tid); del_timer_sync(&tid_tx->addba_resp_timer); del_timer_sync(&tid_tx->session_timer); /* * After this packets are no longer handed right through * to the driver but are put onto tid_tx->pending instead, * with locking to ensure proper access. */ clear_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state); /* * There might be a few packets being processed right now (on * another CPU) that have already gotten past the aggregation * check when it was still OPERATIONAL and consequently have * IEEE80211_TX_CTL_AMPDU set. In that case, this code might * call into the driver at the same time or even before the * TX paths calls into it, which could confuse the driver. * * Wait for all currently running TX paths to finish before * telling the driver. New packets will not go through since * the aggregation session is no longer OPERATIONAL. */ synchronize_net(); tid_tx->stop_initiator = reason == AGG_STOP_PEER_REQUEST ? WLAN_BACK_RECIPIENT : WLAN_BACK_INITIATOR; tid_tx->tx_stop = reason == AGG_STOP_LOCAL_REQUEST; ret = drv_ampdu_action(local, sta->sdata, ¶ms); /* HW shall not deny going back to legacy */ if (WARN_ON(ret)) { /* * We may have pending packets get stuck in this case... * Not bothering with a workaround for now. */ } /* * In the case of AGG_STOP_DESTROY_STA, the driver won't * necessarily call ieee80211_stop_tx_ba_cb(), so this may * seem like we can leave the tid_tx data pending forever. * This is true, in a way, but "forever" is only until the * station struct is actually destroyed. In the meantime, * leaving it around ensures that we don't transmit packets * to the driver on this TID which might confuse it. */ return 0; } /* * After sending add Block Ack request we activated a timer until * add Block Ack response will arrive from the recipient. * If this timer expires sta_addba_resp_timer_expired will be executed. */ static void sta_addba_resp_timer_expired(struct timer_list *t) { struct tid_ampdu_tx *tid_tx_timer = from_timer(tid_tx_timer, t, addba_resp_timer); struct sta_info *sta = tid_tx_timer->sta; u8 tid = tid_tx_timer->tid; struct tid_ampdu_tx *tid_tx; /* check if the TID waits for addBA response */ rcu_read_lock(); tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); if (!tid_tx || test_bit(HT_AGG_STATE_RESPONSE_RECEIVED, &tid_tx->state)) { rcu_read_unlock(); ht_dbg(sta->sdata, "timer expired on %pM tid %d not expecting addBA response\n", sta->sta.addr, tid); return; } ht_dbg(sta->sdata, "addBA response timer expired on %pM tid %d\n", sta->sta.addr, tid); ieee80211_stop_tx_ba_session(&sta->sta, tid); rcu_read_unlock(); } void ieee80211_tx_ba_session_handle_start(struct sta_info *sta, int tid) { struct tid_ampdu_tx *tid_tx; struct ieee80211_local *local = sta->local; struct ieee80211_sub_if_data *sdata = sta->sdata; struct ieee80211_ampdu_params params = { .sta = &sta->sta, .action = IEEE80211_AMPDU_TX_START, .tid = tid, .buf_size = 0, .amsdu = false, .timeout = 0, }; int ret; tid_tx = rcu_dereference_protected_tid_tx(sta, tid); /* * Start queuing up packets for this aggregation session. * We're going to release them once the driver is OK with * that. */ clear_bit(HT_AGG_STATE_WANT_START, &tid_tx->state); ieee80211_agg_stop_txq(sta, tid); /* * Make sure no packets are being processed. This ensures that * we have a valid starting sequence number and that in-flight * packets have been flushed out and no packets for this TID * will go into the driver during the ampdu_action call. */ synchronize_net(); params.ssn = sta->tid_seq[tid] >> 4; ret = drv_ampdu_action(local, sdata, ¶ms); if (ret) { ht_dbg(sdata, "BA request denied - HW unavailable for %pM tid %d\n", sta->sta.addr, tid); spin_lock_bh(&sta->lock); ieee80211_agg_splice_packets(sdata, tid_tx, tid); ieee80211_assign_tid_tx(sta, tid, NULL); ieee80211_agg_splice_finish(sdata, tid); spin_unlock_bh(&sta->lock); ieee80211_agg_start_txq(sta, tid, false); kfree_rcu(tid_tx, rcu_head); return; } /* activate the timer for the recipient's addBA response */ mod_timer(&tid_tx->addba_resp_timer, jiffies + ADDBA_RESP_INTERVAL); ht_dbg(sdata, "activated addBA response timer on %pM tid %d\n", sta->sta.addr, tid); spin_lock_bh(&sta->lock); sta->ampdu_mlme.last_addba_req_time[tid] = jiffies; sta->ampdu_mlme.addba_req_num[tid]++; spin_unlock_bh(&sta->lock); /* send AddBA request */ ieee80211_send_addba_request(sdata, sta->sta.addr, tid, tid_tx->dialog_token, params.ssn, IEEE80211_MAX_AMPDU_BUF, tid_tx->timeout); } /* * After accepting the AddBA Response we activated a timer, * resetting it after each frame that we send. */ static void sta_tx_agg_session_timer_expired(struct timer_list *t) { struct tid_ampdu_tx *tid_tx_timer = from_timer(tid_tx_timer, t, session_timer); struct sta_info *sta = tid_tx_timer->sta; u8 tid = tid_tx_timer->tid; struct tid_ampdu_tx *tid_tx; unsigned long timeout; rcu_read_lock(); tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]); if (!tid_tx || test_bit(HT_AGG_STATE_STOPPING, &tid_tx->state)) { rcu_read_unlock(); return; } timeout = tid_tx->last_tx + TU_TO_JIFFIES(tid_tx->timeout); if (time_is_after_jiffies(timeout)) { mod_timer(&tid_tx->session_timer, timeout); rcu_read_unlock(); return; } rcu_read_unlock(); ht_dbg(sta->sdata, "tx session timer expired on %pM tid %d\n", sta->sta.addr, tid); ieee80211_stop_tx_ba_session(&sta->sta, tid); } int ieee80211_start_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid, u16 timeout) { struct sta_info *sta = container_of(pubsta, struct sta_info, sta); struct ieee80211_sub_if_data *sdata = sta->sdata; struct ieee80211_local *local = sdata->local; struct tid_ampdu_tx *tid_tx; int ret = 0; trace_api_start_tx_ba_session(pubsta, tid); if (WARN(sta->reserved_tid == tid, "Requested to start BA session on reserved tid=%d", tid)) return -EINVAL; if (!pubsta->ht_cap.ht_supported) return -EINVAL; if (WARN_ON_ONCE(!local->ops->ampdu_action)) return -EINVAL; if ((tid >= IEEE80211_NUM_TIDS) || !ieee80211_hw_check(&local->hw, AMPDU_AGGREGATION) || ieee80211_hw_check(&local->hw, TX_AMPDU_SETUP_IN_HW)) return -EINVAL; if (WARN_ON(tid >= IEEE80211_FIRST_TSPEC_TSID)) return -EINVAL; ht_dbg(sdata, "Open BA session requested for %pM tid %u\n", pubsta->addr, tid); if (sdata->vif.type != NL80211_IFTYPE_STATION && sdata->vif.type != NL80211_IFTYPE_MESH_POINT && sdata->vif.type != NL80211_IFTYPE_AP_VLAN && sdata->vif.type != NL80211_IFTYPE_AP && sdata->vif.type != NL80211_IFTYPE_ADHOC) return -EINVAL; if (test_sta_flag(sta, WLAN_STA_BLOCK_BA)) { ht_dbg(sdata, "BA sessions blocked - Denying BA session request %pM tid %d\n", sta->sta.addr, tid); return -EINVAL; } /* * 802.11n-2009 11.5.1.1: If the initiating STA is an HT STA, is a * member of an IBSS, and has no other existing Block Ack agreement * with the recipient STA, then the initiating STA shall transmit a * Probe Request frame to the recipient STA and shall not transmit an * ADDBA Request frame unless it receives a Probe Response frame * from the recipient within dot11ADDBAFailureTimeout. * * The probe request mechanism for ADDBA is currently not implemented, * but we only build up Block Ack session with HT STAs. This information * is set when we receive a bss info from a probe response or a beacon. */ if (sta->sdata->vif.type == NL80211_IFTYPE_ADHOC && !sta->sta.ht_cap.ht_supported) { ht_dbg(sdata, "BA request denied - IBSS STA %pM does not advertise HT support\n", pubsta->addr); return -EINVAL; } spin_lock_bh(&sta->lock); /* we have tried too many times, receiver does not want A-MPDU */ if (sta->ampdu_mlme.addba_req_num[tid] > HT_AGG_MAX_RETRIES) { ret = -EBUSY; goto err_unlock_sta; } /* * if we have tried more than HT_AGG_BURST_RETRIES times we * will spread our requests in time to avoid stalling connection * for too long */ if (sta->ampdu_mlme.addba_req_num[tid] > HT_AGG_BURST_RETRIES && time_before(jiffies, sta->ampdu_mlme.last_addba_req_time[tid] + HT_AGG_RETRIES_PERIOD)) { ht_dbg(sdata, "BA request denied - %d failed requests on %pM tid %u\n", sta->ampdu_mlme.addba_req_num[tid], sta->sta.addr, tid); ret = -EBUSY; goto err_unlock_sta; } tid_tx = rcu_dereference_protected_tid_tx(sta, tid); /* check if the TID is not in aggregation flow already */ if (tid_tx || sta->ampdu_mlme.tid_start_tx[tid]) { ht_dbg(sdata, "BA request denied - session is not idle on %pM tid %u\n", sta->sta.addr, tid); ret = -EAGAIN; goto err_unlock_sta; } /* prepare A-MPDU MLME for Tx aggregation */ tid_tx = kzalloc(sizeof(struct tid_ampdu_tx), GFP_ATOMIC); if (!tid_tx) { ret = -ENOMEM; goto err_unlock_sta; } skb_queue_head_init(&tid_tx->pending); __set_bit(HT_AGG_STATE_WANT_START, &tid_tx->state); tid_tx->timeout = timeout; tid_tx->sta = sta; tid_tx->tid = tid; /* response timer */ timer_setup(&tid_tx->addba_resp_timer, sta_addba_resp_timer_expired, 0); /* tx timer */ timer_setup(&tid_tx->session_timer, sta_tx_agg_session_timer_expired, TIMER_DEFERRABLE); /* assign a dialog token */ sta->ampdu_mlme.dialog_token_allocator++; tid_tx->dialog_token = sta->ampdu_mlme.dialog_token_allocator; /* * Finally, assign it to the start array; the work item will * collect it and move it to the normal array. */ sta->ampdu_mlme.tid_start_tx[tid] = tid_tx; ieee80211_queue_work(&local->hw, &sta->ampdu_mlme.work); /* this flow continues off the work */ err_unlock_sta: spin_unlock_bh(&sta->lock); return ret; } EXPORT_SYMBOL(ieee80211_start_tx_ba_session); static void ieee80211_agg_tx_operational(struct ieee80211_local *local, struct sta_info *sta, u16 tid) { struct tid_ampdu_tx *tid_tx; struct ieee80211_ampdu_params params = { .sta = &sta->sta, .action = IEEE80211_AMPDU_TX_OPERATIONAL, .tid = tid, .timeout = 0, .ssn = 0, }; lockdep_assert_held(&sta->ampdu_mlme.mtx); tid_tx = rcu_dereference_protected_tid_tx(sta, tid); params.buf_size = tid_tx->buf_size; params.amsdu = tid_tx->amsdu; ht_dbg(sta->sdata, "Aggregation is on for %pM tid %d\n", sta->sta.addr, tid); drv_ampdu_action(local, sta->sdata, ¶ms); /* * synchronize with TX path, while splicing the TX path * should block so it won't put more packets onto pending. */ spin_lock_bh(&sta->lock); ieee80211_agg_splice_packets(sta->sdata, tid_tx, tid); /* * Now mark as operational. This will be visible * in the TX path, and lets it go lock-free in * the common case. */ set_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state); ieee80211_agg_splice_finish(sta->sdata, tid); spin_unlock_bh(&sta->lock); ieee80211_agg_start_txq(sta, tid, true); } void ieee80211_start_tx_ba_cb(struct sta_info *sta, int tid, struct tid_ampdu_tx *tid_tx) { struct ieee80211_sub_if_data *sdata = sta->sdata; struct ieee80211_local *local = sdata->local; if (WARN_ON(test_and_set_bit(HT_AGG_STATE_DRV_READY, &tid_tx->state))) return; if (test_bit(HT_AGG_STATE_RESPONSE_RECEIVED, &tid_tx->state)) ieee80211_agg_tx_operational(local, sta, tid); } static struct tid_ampdu_tx * ieee80211_lookup_tid_tx(struct ieee80211_sub_if_data *sdata, const u8 *ra, u16 tid, struct sta_info **sta) { struct tid_ampdu_tx *tid_tx; if (tid >= IEEE80211_NUM_TIDS) { ht_dbg(sdata, "Bad TID value: tid = %d (>= %d)\n", tid, IEEE80211_NUM_TIDS); return NULL; } *sta = sta_info_get_bss(sdata, ra); if (!*sta) { ht_dbg(sdata, "Could not find station: %pM\n", ra); return NULL; } tid_tx = rcu_dereference((*sta)->ampdu_mlme.tid_tx[tid]); if (WARN_ON(!tid_tx)) ht_dbg(sdata, "addBA was not requested!\n"); return tid_tx; } void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, u16 tid) { struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); struct ieee80211_local *local = sdata->local; struct sta_info *sta; struct tid_ampdu_tx *tid_tx; trace_api_start_tx_ba_cb(sdata, ra, tid); rcu_read_lock(); tid_tx = ieee80211_lookup_tid_tx(sdata, ra, tid, &sta); if (!tid_tx) goto out; set_bit(HT_AGG_STATE_START_CB, &tid_tx->state); ieee80211_queue_work(&local->hw, &sta->ampdu_mlme.work); out: rcu_read_unlock(); } EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe); int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid, enum ieee80211_agg_stop_reason reason) { int ret; mutex_lock(&sta->ampdu_mlme.mtx); ret = ___ieee80211_stop_tx_ba_session(sta, tid, reason); mutex_unlock(&sta->ampdu_mlme.mtx); return ret; } int ieee80211_stop_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid) { struct sta_info *sta = container_of(pubsta, struct sta_info, sta); struct ieee80211_sub_if_data *sdata = sta->sdata; struct ieee80211_local *local = sdata->local; struct tid_ampdu_tx *tid_tx; int ret = 0; trace_api_stop_tx_ba_session(pubsta, tid); if (!local->ops->ampdu_action) return -EINVAL; if (tid >= IEEE80211_NUM_TIDS) return -EINVAL; spin_lock_bh(&sta->lock); tid_tx = rcu_dereference_protected_tid_tx(sta, tid); if (!tid_tx) { ret = -ENOENT; goto unlock; } WARN(sta->reserved_tid == tid, "Requested to stop BA session on reserved tid=%d", tid); if (test_bit(HT_AGG_STATE_STOPPING, &tid_tx->state)) { /* already in progress stopping it */ ret = 0; goto unlock; } set_bit(HT_AGG_STATE_WANT_STOP, &tid_tx->state); ieee80211_queue_work(&local->hw, &sta->ampdu_mlme.work); unlock: spin_unlock_bh(&sta->lock); return ret; } EXPORT_SYMBOL(ieee80211_stop_tx_ba_session); void ieee80211_stop_tx_ba_cb(struct sta_info *sta, int tid, struct tid_ampdu_tx *tid_tx) { struct ieee80211_sub_if_data *sdata = sta->sdata; bool send_delba = false; ht_dbg(sdata, "Stopping Tx BA session for %pM tid %d\n", sta->sta.addr, tid); spin_lock_bh(&sta->lock); if (!test_bit(HT_AGG_STATE_STOPPING, &tid_tx->state)) { ht_dbg(sdata, "unexpected callback to A-MPDU stop for %pM tid %d\n", sta->sta.addr, tid); goto unlock_sta; } if (tid_tx->stop_initiator == WLAN_BACK_INITIATOR && tid_tx->tx_stop) send_delba = true; ieee80211_remove_tid_tx(sta, tid); unlock_sta: spin_unlock_bh(&sta->lock); if (send_delba) ieee80211_send_delba(sdata, sta->sta.addr, tid, WLAN_BACK_INITIATOR, WLAN_REASON_QSTA_NOT_USE); } void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, u16 tid) { struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); struct ieee80211_local *local = sdata->local; struct sta_info *sta; struct tid_ampdu_tx *tid_tx; trace_api_stop_tx_ba_cb(sdata, ra, tid); rcu_read_lock(); tid_tx = ieee80211_lookup_tid_tx(sdata, ra, tid, &sta); if (!tid_tx) goto out; set_bit(HT_AGG_STATE_STOP_CB, &tid_tx->state); ieee80211_queue_work(&local->hw, &sta->ampdu_mlme.work); out: rcu_read_unlock(); } EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe); void ieee80211_process_addba_resp(struct ieee80211_local *local, struct sta_info *sta, struct ieee80211_mgmt *mgmt, size_t len) { struct tid_ampdu_tx *tid_tx; struct ieee80211_txq *txq; u16 capab, tid; u8 buf_size; bool amsdu; capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab); amsdu = capab & IEEE80211_ADDBA_PARAM_AMSDU_MASK; tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2; buf_size = (capab & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) >> 6; buf_size = min(buf_size, local->hw.max_tx_aggregation_subframes); txq = sta->sta.txq[tid]; if (!amsdu && txq) set_bit(IEEE80211_TXQ_NO_AMSDU, &to_txq_info(txq)->flags); mutex_lock(&sta->ampdu_mlme.mtx); tid_tx = rcu_dereference_protected_tid_tx(sta, tid); if (!tid_tx) goto out; if (mgmt->u.action.u.addba_resp.dialog_token != tid_tx->dialog_token) { ht_dbg(sta->sdata, "wrong addBA response token, %pM tid %d\n", sta->sta.addr, tid); goto out; } del_timer_sync(&tid_tx->addba_resp_timer); ht_dbg(sta->sdata, "switched off addBA timer for %pM tid %d\n", sta->sta.addr, tid); /* * addba_resp_timer may have fired before we got here, and * caused WANT_STOP to be set. If the stop then was already * processed further, STOPPING might be set. */ if (test_bit(HT_AGG_STATE_WANT_STOP, &tid_tx->state) || test_bit(HT_AGG_STATE_STOPPING, &tid_tx->state)) { ht_dbg(sta->sdata, "got addBA resp for %pM tid %d but we already gave up\n", sta->sta.addr, tid); goto out; } /* * IEEE 802.11-2007 7.3.1.14: * In an ADDBA Response frame, when the Status Code field * is set to 0, the Buffer Size subfield is set to a value * of at least 1. */ if (le16_to_cpu(mgmt->u.action.u.addba_resp.status) == WLAN_STATUS_SUCCESS && buf_size) { if (test_and_set_bit(HT_AGG_STATE_RESPONSE_RECEIVED, &tid_tx->state)) { /* ignore duplicate response */ goto out; } tid_tx->buf_size = buf_size; tid_tx->amsdu = amsdu; if (test_bit(HT_AGG_STATE_DRV_READY, &tid_tx->state)) ieee80211_agg_tx_operational(local, sta, tid); sta->ampdu_mlme.addba_req_num[tid] = 0; if (tid_tx->timeout) { mod_timer(&tid_tx->session_timer, TU_TO_EXP_TIME(tid_tx->timeout)); tid_tx->last_tx = jiffies; } } else { ___ieee80211_stop_tx_ba_session(sta, tid, AGG_STOP_DECLINED); } out: mutex_unlock(&sta->ampdu_mlme.mtx); }
/* * ANI performs periodic noise floor calibration * 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 && test_bit(NFCAL_INTF, &ah->caldata->cal_flags)) 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) { if (++ah->ani_skip_count >= ATH_ANI_MAX_SKIP_COUNT) { spin_lock_irqsave(&sc->sc_pm_lock, flags); sc->ps_flags |= PS_WAIT_FOR_ANI; spin_unlock_irqrestore(&sc->sc_pm_lock, flags); } goto set_timer; } ah->ani_skip_count = 0; spin_lock_irqsave(&sc->sc_pm_lock, flags); sc->ps_flags &= ~PS_WAIT_FOR_ANI; spin_unlock_irqrestore(&sc->sc_pm_lock, flags); ath9k_ps_wakeup(sc); /* Long calibration runs independently of short calibration. */ if ((timestamp - common->ani.longcal_timer) >= long_cal_interval) { longcal = true; 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; 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; } /* 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, ah->rxchainmask, longcal); } ath_dbg(common, ANI, "Calibration @%lu finished: %s %s %s, caldone: %s\n", jiffies, longcal ? "long" : "", shortcal ? "short" : "", aniflag ? "ani" : "", common->ani.caldone ? "true" : "false"); 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; 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 (ar9003_is_paprd_enabled(ah) && ah->caldata) { if (!test_bit(PAPRD_DONE, &ah->caldata->cal_flags)) { ieee80211_queue_work(sc->hw, &sc->paprd_work); } else if (!ah->paprd_table_write_done) { ath9k_ps_wakeup(sc); ath_paprd_activate(sc); 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) || (status & ATH9K_INT_BB_WATCHDOG)) { spin_lock(&sc->sc_pcu_lock); ath_reset(sc, true); spin_unlock(&sc->sc_pcu_lock); 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 ((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 | PS_TSFOOR_SYNC; } 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 (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); }
int ieee80211_start_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid) { struct sta_info *sta = container_of(pubsta, struct sta_info, sta); struct ieee80211_sub_if_data *sdata = sta->sdata; struct ieee80211_local *local = sdata->local; struct tid_ampdu_tx *tid_tx; int ret = 0; trace_api_start_tx_ba_session(pubsta, tid); if (WARN_ON(!local->ops->ampdu_action)) return -EINVAL; if ((tid >= STA_TID_NUM) || !(local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION)) return -EINVAL; #ifdef CONFIG_MAC80211_HT_DEBUG printk(KERN_DEBUG "Open BA session requested for %pM tid %u\n", pubsta->addr, tid); #endif /* CONFIG_MAC80211_HT_DEBUG */ /* * The aggregation code is not prepared to handle * anything but STA/AP due to the BSSID handling. * IBSS could work in the code but isn't supported * by drivers or the standard. */ if (sdata->vif.type != NL80211_IFTYPE_STATION && sdata->vif.type != NL80211_IFTYPE_AP_VLAN && sdata->vif.type != NL80211_IFTYPE_AP) return -EINVAL; if (test_sta_flags(sta, WLAN_STA_BLOCK_BA)) { #ifdef CONFIG_MAC80211_HT_DEBUG printk(KERN_DEBUG "BA sessions blocked. " "Denying BA session request\n"); #endif return -EINVAL; } spin_lock_bh(&sta->lock); /* we have tried too many times, receiver does not want A-MPDU */ if (sta->ampdu_mlme.addba_req_num[tid] > HT_AGG_MAX_RETRIES) { ret = -EBUSY; goto err_unlock_sta; } tid_tx = sta->ampdu_mlme.tid_tx[tid]; /* check if the TID is not in aggregation flow already */ if (tid_tx) { #ifdef CONFIG_MAC80211_HT_DEBUG printk(KERN_DEBUG "BA request denied - session is not " "idle on tid %u\n", tid); #endif /* CONFIG_MAC80211_HT_DEBUG */ ret = -EAGAIN; goto err_unlock_sta; } /* prepare A-MPDU MLME for Tx aggregation */ tid_tx = kzalloc(sizeof(struct tid_ampdu_tx), GFP_ATOMIC); if (!tid_tx) { #ifdef CONFIG_MAC80211_HT_DEBUG if (net_ratelimit()) printk(KERN_ERR "allocate tx mlme to tid %d failed\n", tid); #endif ret = -ENOMEM; goto err_unlock_sta; } skb_queue_head_init(&tid_tx->pending); __set_bit(HT_AGG_STATE_WANT_START, &tid_tx->state); /* Tx timer */ tid_tx->addba_resp_timer.function = sta_addba_resp_timer_expired; tid_tx->addba_resp_timer.data = (unsigned long)&sta->timer_to_tid[tid]; init_timer(&tid_tx->addba_resp_timer); /* assign a dialog token */ sta->ampdu_mlme.dialog_token_allocator++; tid_tx->dialog_token = sta->ampdu_mlme.dialog_token_allocator; /* finally, assign it to the array */ rcu_assign_pointer(sta->ampdu_mlme.tid_tx[tid], tid_tx); ieee80211_queue_work(&local->hw, &sta->ampdu_mlme.work); /* this flow continues off the work */ err_unlock_sta: spin_unlock_bh(&sta->lock); return ret; }
void b43_dma_handle_txstatus(struct b43_wldev *dev, const struct b43_txstatus *status) { const struct b43_dma_ops *ops; struct b43_dmaring *ring; struct b43_dmadesc_meta *meta; static const struct b43_txstatus fake; /* filled with 0 */ const struct b43_txstatus *txstat; int slot, firstused; bool frame_succeed; int skip; static u8 err_out1, err_out2; ring = parse_cookie(dev, status->cookie, &slot); if (unlikely(!ring)) return; B43_WARN_ON(!ring->tx); /* Sanity check: TX packets are processed in-order on one ring. * Check if the slot deduced from the cookie really is the first * used slot. */ firstused = ring->current_slot - ring->used_slots + 1; if (firstused < 0) firstused = ring->nr_slots + firstused; skip = 0; if (unlikely(slot != firstused)) { /* This possibly is a firmware bug and will result in * malfunction, memory leaks and/or stall of DMA functionality. */ if (slot == next_slot(ring, next_slot(ring, firstused))) { /* If a single header/data pair was missed, skip over * the first two slots in an attempt to recover. */ slot = firstused; skip = 2; if (!err_out1) { /* Report the error once. */ b43dbg(dev->wl, "Skip on DMA ring %d slot %d.\n", ring->index, slot); err_out1 = 1; } } else { /* More than a single header/data pair were missed. * Report this error once. */ if (!err_out2) b43dbg(dev->wl, "Out of order TX status report on DMA ring %d. Expected %d, but got %d\n", ring->index, firstused, slot); err_out2 = 1; return; } } ops = ring->ops; while (1) { B43_WARN_ON(slot < 0 || slot >= ring->nr_slots); /* get meta - ignore returned value */ ops->idx2desc(ring, slot, &meta); if (b43_dma_ptr_is_poisoned(meta->skb)) { b43dbg(dev->wl, "Poisoned TX slot %d (first=%d) " "on ring %d\n", slot, firstused, ring->index); break; } if (meta->skb) { struct b43_private_tx_info *priv_info = b43_get_priv_tx_info(IEEE80211_SKB_CB(meta->skb)); unmap_descbuffer(ring, meta->dmaaddr, meta->skb->len, 1); kfree(priv_info->bouncebuffer); priv_info->bouncebuffer = NULL; } else { unmap_descbuffer(ring, meta->dmaaddr, b43_txhdr_size(dev), 1); } if (meta->is_last_fragment) { struct ieee80211_tx_info *info; if (unlikely(!meta->skb)) { /* This is a scatter-gather fragment of a frame, * so the skb pointer must not be NULL. */ b43dbg(dev->wl, "TX status unexpected NULL skb " "at slot %d (first=%d) on ring %d\n", slot, firstused, ring->index); break; } info = IEEE80211_SKB_CB(meta->skb); /* * Call back to inform the ieee80211 subsystem about * the status of the transmission. When skipping over * a missed TX status report, use a status structure * filled with zeros to indicate that the frame was not * sent (frame_count 0) and not acknowledged */ if (unlikely(skip)) txstat = &fake; else txstat = status; frame_succeed = b43_fill_txstatus_report(dev, info, txstat); #ifdef CPTCFG_B43_DEBUG if (frame_succeed) ring->nr_succeed_tx_packets++; else ring->nr_failed_tx_packets++; ring->nr_total_packet_tries += status->frame_count; #endif /* DEBUG */ ieee80211_tx_status(dev->wl->hw, meta->skb); /* skb will be freed by ieee80211_tx_status(). * Poison our pointer. */ meta->skb = B43_DMA_PTR_POISON; } else { /* No need to call free_descriptor_buffer here, as * this is only the txhdr, which is not allocated. */ if (unlikely(meta->skb)) { b43dbg(dev->wl, "TX status unexpected non-NULL skb " "at slot %d (first=%d) on ring %d\n", slot, firstused, ring->index); break; } } /* Everything unmapped and free'd. So it's not used anymore. */ ring->used_slots--; if (meta->is_last_fragment && !skip) { /* This is the last scatter-gather * fragment of the frame. We are done. */ break; } slot = next_slot(ring, slot); if (skip > 0) --skip; } if (ring->stopped) { B43_WARN_ON(free_slots(ring) < TX_SLOTS_PER_FRAME); ring->stopped = false; } if (dev->wl->tx_queue_stopped[ring->queue_prio]) { dev->wl->tx_queue_stopped[ring->queue_prio] = 0; } else { /* If the driver queue is running wake the corresponding * mac80211 queue. */ ieee80211_wake_queue(dev->wl->hw, ring->queue_prio); if (b43_debug(dev, B43_DBG_DMAVERBOSE)) { b43dbg(dev->wl, "Woke up TX ring %d\n", ring->index); } } /* Add work to the queue. */ ieee80211_queue_work(dev->wl->hw, &dev->wl->tx_work); }
/* * 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; } /* 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); } }
int ieee80211_start_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid, u16 timeout) { struct sta_info *sta = container_of(pubsta, struct sta_info, sta); struct ieee80211_sub_if_data *sdata = sta->sdata; struct ieee80211_local *local = sdata->local; struct tid_ampdu_tx *tid_tx; int ret = 0; trace_api_start_tx_ba_session(pubsta, tid); if (WARN_ON(!local->ops->ampdu_action)) return -EINVAL; if ((tid >= STA_TID_NUM) || !(local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION) || (local->hw.flags & IEEE80211_HW_TX_AMPDU_SETUP_IN_HW)) return -EINVAL; #ifdef CONFIG_MAC80211_HT_DEBUG printk(KERN_DEBUG "Open BA session requested for %pM tid %u\n", pubsta->addr, tid); #endif /* CONFIG_MAC80211_HT_DEBUG */ if (sdata->vif.type != NL80211_IFTYPE_STATION && sdata->vif.type != NL80211_IFTYPE_MESH_POINT && sdata->vif.type != NL80211_IFTYPE_AP_VLAN && sdata->vif.type != NL80211_IFTYPE_AP && sdata->vif.type != NL80211_IFTYPE_ADHOC) return -EINVAL; if (test_sta_flag(sta, WLAN_STA_BLOCK_BA)) { #ifdef CONFIG_MAC80211_HT_DEBUG printk(KERN_DEBUG "BA sessions blocked. " "Denying BA session request\n"); #endif return -EINVAL; } /* * 802.11n-2009 11.5.1.1: If the initiating STA is an HT STA, is a * member of an IBSS, and has no other existing Block Ack agreement * with the recipient STA, then the initiating STA shall transmit a * Probe Request frame to the recipient STA and shall not transmit an * ADDBA Request frame unless it receives a Probe Response frame * from the recipient within dot11ADDBAFailureTimeout. * * The probe request mechanism for ADDBA is currently not implemented, * but we only build up Block Ack session with HT STAs. This information * is set when we receive a bss info from a probe response or a beacon. */ if (sta->sdata->vif.type == NL80211_IFTYPE_ADHOC && !sta->sta.ht_cap.ht_supported) { #ifdef CONFIG_MAC80211_HT_DEBUG printk(KERN_DEBUG "BA request denied - IBSS STA %pM" "does not advertise HT support\n", pubsta->addr); #endif /* CONFIG_MAC80211_HT_DEBUG */ return -EINVAL; } spin_lock_bh(&sta->lock); /* we have tried too many times, receiver does not want A-MPDU */ if (sta->ampdu_mlme.addba_req_num[tid] > HT_AGG_MAX_RETRIES) { ret = -EBUSY; goto err_unlock_sta; } /* * if we have tried more than HT_AGG_BURST_RETRIES times we * will spread our requests in time to avoid stalling connection * for too long */ if (sta->ampdu_mlme.addba_req_num[tid] > HT_AGG_BURST_RETRIES && time_before(jiffies, sta->ampdu_mlme.last_addba_req_time[tid] + HT_AGG_RETRIES_PERIOD)) { #ifdef CONFIG_MAC80211_HT_DEBUG printk(KERN_DEBUG "BA request denied - " "waiting a grace period after %d failed requests " "on tid %u\n", sta->ampdu_mlme.addba_req_num[tid], tid); #endif /* CONFIG_MAC80211_HT_DEBUG */ ret = -EBUSY; goto err_unlock_sta; } tid_tx = rcu_dereference_protected_tid_tx(sta, tid); /* check if the TID is not in aggregation flow already */ if (tid_tx || sta->ampdu_mlme.tid_start_tx[tid]) { #ifdef CONFIG_MAC80211_HT_DEBUG printk(KERN_DEBUG "BA request denied - session is not " "idle on tid %u\n", tid); #endif /* CONFIG_MAC80211_HT_DEBUG */ ret = -EAGAIN; goto err_unlock_sta; } /* prepare A-MPDU MLME for Tx aggregation */ tid_tx = kzalloc(sizeof(struct tid_ampdu_tx), GFP_ATOMIC); if (!tid_tx) { ret = -ENOMEM; goto err_unlock_sta; } skb_queue_head_init(&tid_tx->pending); __set_bit(HT_AGG_STATE_WANT_START, &tid_tx->state); tid_tx->timeout = timeout; /* response timer */ tid_tx->addba_resp_timer.function = sta_addba_resp_timer_expired; tid_tx->addba_resp_timer.data = (unsigned long)&sta->timer_to_tid[tid]; init_timer(&tid_tx->addba_resp_timer); /* tx timer */ tid_tx->session_timer.function = sta_tx_agg_session_timer_expired; tid_tx->session_timer.data = (unsigned long)&sta->timer_to_tid[tid]; init_timer_deferrable(&tid_tx->session_timer); /* assign a dialog token */ sta->ampdu_mlme.dialog_token_allocator++; tid_tx->dialog_token = sta->ampdu_mlme.dialog_token_allocator; /* * Finally, assign it to the start array; the work item will * collect it and move it to the normal array. */ sta->ampdu_mlme.tid_start_tx[tid] = tid_tx; ieee80211_queue_work(&local->hw, &sta->ampdu_mlme.work); /* this flow continues off the work */ err_unlock_sta: spin_unlock_bh(&sta->lock); return ret; }
int wl1271_ps_elp_wakeup(struct wl1271 *wl) { DECLARE_COMPLETION_ONSTACK(compl); unsigned long flags; int ret; u32 start_time = jiffies; bool pending = false; /* we might try to wakeup although we didn't go to sleep (e.g. on boot) */ if (!test_and_clear_bit(WL1271_FLAG_ELP_REQUESTED, &wl->flags)) return 0; /* don't cancel_sync as it might contend for a mutex and deadlock */ cancel_delayed_work(&wl->elp_work); if (!test_bit(WL1271_FLAG_IN_ELP, &wl->flags)) return 0; wl1271_debug(DEBUG_PSM, "waking up chip from elp"); /* * The spinlock is required here to synchronize both the work and * the completion variable in one entity. */ spin_lock_irqsave(&wl->wl_lock, flags); if (test_bit(WL1271_FLAG_IRQ_RUNNING, &wl->flags)) pending = true; else wl->elp_compl = &compl; spin_unlock_irqrestore(&wl->wl_lock, flags); wl1271_raw_write32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, ELPCTRL_WAKE_UP); if (!pending) { ret = wait_for_completion_timeout( &compl, msecs_to_jiffies(WL1271_WAKEUP_TIMEOUT)); if (ret == 0) { wl1271_error("ELP wakeup timeout!"); ieee80211_queue_work(wl->hw, &wl->recovery_work); ret = -ETIMEDOUT; goto err; } else if (ret < 0) { wl1271_error("ELP wakeup completion error."); goto err; } } clear_bit(WL1271_FLAG_IN_ELP, &wl->flags); wl1271_debug(DEBUG_PSM, "wakeup time: %u ms", jiffies_to_msecs(jiffies - start_time)); goto out; err: spin_lock_irqsave(&wl->wl_lock, flags); wl->elp_compl = NULL; spin_unlock_irqrestore(&wl->wl_lock, flags); return ret; out: return 0; }
void ath_rx_poll(unsigned long data) { struct ath_softc *sc = (struct ath_softc *)data; ieee80211_queue_work(sc->hw, &sc->hw_check_work); }
void ath9k_beacon_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); struct ath_buf *bf = NULL; struct ieee80211_vif *vif; bool edma = !!(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA); int slot; if (test_bit(SC_OP_HW_RESET, &sc->sc_flags)) { ath_dbg(common, RESET, "reset work is pending, skip beaconing now\n"); return; } /* * Check if the previous beacon has gone out. If * not don't try to post another, skip this period * and wait for the next. Missed beacons indicate * a problem and should not occur. If we miss too * many consecutive beacons reset the device. */ if (ath9k_hw_numtxpending(ah, sc->beacon.beaconq) != 0) { sc->beacon.bmisscnt++; if (!ath9k_hw_check_alive(ah)) ieee80211_queue_work(sc->hw, &sc->hw_check_work); if (sc->beacon.bmisscnt < BSTUCK_THRESH * sc->nbcnvifs) { ath_dbg(common, BSTUCK, "missed %u consecutive beacons\n", sc->beacon.bmisscnt); ath9k_hw_stop_dma_queue(ah, sc->beacon.beaconq); if (sc->beacon.bmisscnt > 3) ath9k_hw_bstuck_nfcal(ah); } else if (sc->beacon.bmisscnt >= BSTUCK_THRESH) { ath_dbg(common, BSTUCK, "beacon is officially stuck\n"); sc->beacon.bmisscnt = 0; ath9k_queue_reset(sc, RESET_TYPE_BEACON_STUCK); } return; } slot = ath9k_beacon_choose_slot(sc); vif = sc->beacon.bslot[slot]; if (!vif || !vif->bss_conf.enable_beacon) return; bf = ath9k_beacon_generate(sc->hw, vif); WARN_ON(!bf); if (sc->beacon.bmisscnt != 0) { ath_dbg(common, BSTUCK, "resume beacon xmit after %u misses\n", sc->beacon.bmisscnt); sc->beacon.bmisscnt = 0; } /* * Handle slot time change when a non-ERP station joins/leaves * an 11g network. The 802.11 layer notifies us via callback, * we mark updateslot, then wait one beacon before effecting * the change. This gives associated stations at least one * beacon interval to note the state change. * * NB: The slot time change state machine is clocked according * to whether we are bursting or staggering beacons. We * recognize the request to update and record the current * slot then don't transition until that slot is reached * again. If we miss a beacon for that slot then we'll be * slow to transition but we'll be sure at least one beacon * interval has passed. When bursting slot is always left * set to ATH_BCBUF so this check is a noop. */ if (sc->beacon.updateslot == UPDATE) { sc->beacon.updateslot = COMMIT; sc->beacon.slotupdate = slot; } else if (sc->beacon.updateslot == COMMIT && sc->beacon.slotupdate == slot) { ah->slottime = sc->beacon.slottime; ath9k_hw_init_global_settings(ah); sc->beacon.updateslot = OK; } if (bf) { ath9k_reset_beacon_status(sc); ath_dbg(common, BEACON, "Transmitting beacon for slot: %d\n", slot); /* NB: cabq traffic should already be queued and primed */ ath9k_hw_puttxbuf(ah, sc->beacon.beaconq, bf->bf_daddr); if (!edma) ath9k_hw_txstart(ah, sc->beacon.beaconq); } }
int ath9k_wiphy_select(struct ath_wiphy *aphy) { struct ath_softc *sc = aphy->sc; bool now; spin_lock_bh(&sc->wiphy_lock); if (__ath9k_wiphy_scanning(sc)) { /* * For now, we are using mac80211 sw scan and it expects to * have full control over channel changes, so avoid wiphy * scheduling during a scan. This could be optimized if the * scanning control were moved into the driver. */ spin_unlock_bh(&sc->wiphy_lock); return -EBUSY; } if (__ath9k_wiphy_pausing(sc)) { if (sc->wiphy_select_failures == 0) sc->wiphy_select_first_fail = jiffies; sc->wiphy_select_failures++; if (time_after(jiffies, sc->wiphy_select_first_fail + HZ / 2)) { printk(KERN_DEBUG "ath9k: Previous wiphy select timed " "out; disable/enable hw to recover\n"); __ath9k_wiphy_mark_all_paused(sc); /* * TODO: this workaround to fix hardware is unlikely to * be specific to virtual wiphy changes. It can happen * on normal channel change, too, and as such, this * should really be made more generic. For example, * tricker radio disable/enable on GTT interrupt burst * (say, 10 GTT interrupts received without any TX * frame being completed) */ spin_unlock_bh(&sc->wiphy_lock); ath_radio_disable(sc, aphy->hw); ath_radio_enable(sc, aphy->hw); /* Only the primary wiphy hw is used for queuing work */ ieee80211_queue_work(aphy->sc->hw, &aphy->sc->chan_work); return -EBUSY; /* previous select still in progress */ } spin_unlock_bh(&sc->wiphy_lock); return -EBUSY; /* previous select still in progress */ } sc->wiphy_select_failures = 0; /* Store the new channel */ sc->chan_idx = aphy->chan_idx; sc->chan_is_ht = aphy->chan_is_ht; sc->next_wiphy = aphy; __ath9k_wiphy_pause_all(sc); now = !__ath9k_wiphy_pausing(aphy->sc); spin_unlock_bh(&sc->wiphy_lock); if (now) { /* Ready to request channel change immediately */ ieee80211_queue_work(aphy->sc->hw, &aphy->sc->chan_work); } /* * wiphys will be unpaused in ath9k_tx_status() once channel has been * changed if any wiphy needs time to become paused. */ return 0; }
static void ieee80211_agg_tx_operational(struct ieee80211_local *local, struct sta_info *sta, u16 tid) { struct tid_ampdu_tx *tid_tx; struct ieee80211_ampdu_params params = { .sta = &sta->sta, .action = IEEE80211_AMPDU_TX_OPERATIONAL, .tid = tid, .timeout = 0, .ssn = 0, }; lockdep_assert_held(&sta->ampdu_mlme.mtx); tid_tx = rcu_dereference_protected_tid_tx(sta, tid); params.buf_size = tid_tx->buf_size; params.amsdu = tid_tx->amsdu; ht_dbg(sta->sdata, "Aggregation is on for %pM tid %d\n", sta->sta.addr, tid); drv_ampdu_action(local, sta->sdata, ¶ms); /* * synchronize with TX path, while splicing the TX path * should block so it won't put more packets onto pending. */ spin_lock_bh(&sta->lock); ieee80211_agg_splice_packets(sta->sdata, tid_tx, tid); /* * Now mark as operational. This will be visible * in the TX path, and lets it go lock-free in * the common case. */ set_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state); ieee80211_agg_splice_finish(sta->sdata, tid); spin_unlock_bh(&sta->lock); ieee80211_agg_start_txq(sta, tid, true); } void ieee80211_start_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u16 tid) { struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); struct ieee80211_local *local = sdata->local; struct sta_info *sta; struct tid_ampdu_tx *tid_tx; trace_api_start_tx_ba_cb(sdata, ra, tid); if (tid >= IEEE80211_NUM_TIDS) { ht_dbg(sdata, "Bad TID value: tid = %d (>= %d)\n", tid, IEEE80211_NUM_TIDS); return; } mutex_lock(&local->sta_mtx); sta = sta_info_get_bss(sdata, ra); if (!sta) { mutex_unlock(&local->sta_mtx); ht_dbg(sdata, "Could not find station: %pM\n", ra); return; } mutex_lock(&sta->ampdu_mlme.mtx); tid_tx = rcu_dereference_protected_tid_tx(sta, tid); if (WARN_ON(!tid_tx)) { ht_dbg(sdata, "addBA was not requested!\n"); goto unlock; } if (WARN_ON(test_and_set_bit(HT_AGG_STATE_DRV_READY, &tid_tx->state))) goto unlock; if (test_bit(HT_AGG_STATE_RESPONSE_RECEIVED, &tid_tx->state)) ieee80211_agg_tx_operational(local, sta, tid); unlock: mutex_unlock(&sta->ampdu_mlme.mtx); mutex_unlock(&local->sta_mtx); } void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, u16 tid) { struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); struct ieee80211_local *local = sdata->local; struct ieee80211_ra_tid *ra_tid; struct sk_buff *skb = dev_alloc_skb(0); if (unlikely(!skb)) return; ra_tid = (struct ieee80211_ra_tid *) &skb->cb; memcpy(&ra_tid->ra, ra, ETH_ALEN); ra_tid->tid = tid; skb->pkt_type = IEEE80211_SDATA_QUEUE_AGG_START; skb_queue_tail(&sdata->skb_queue, skb); ieee80211_queue_work(&local->hw, &sdata->work); } EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe); int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid, enum ieee80211_agg_stop_reason reason) { int ret; mutex_lock(&sta->ampdu_mlme.mtx); ret = ___ieee80211_stop_tx_ba_session(sta, tid, reason); mutex_unlock(&sta->ampdu_mlme.mtx); return ret; }
void wl1271_rx(struct wl1271 *wl, struct wl1271_fw_status *status) { struct wl1271_acx_mem_map *wl_mem_map = wl->target_mem_map; u32 buf_size; u32 fw_rx_counter = status->fw_rx_counter & NUM_RX_PKT_DESC_MOD_MASK; u32 drv_rx_counter = wl->rx_counter & NUM_RX_PKT_DESC_MOD_MASK; u32 rx_counter; u32 mem_block; u32 pkt_length; u32 pkt_offset; bool is_ap = (wl->bss_type == BSS_TYPE_AP_BSS); bool had_data = false; bool unaligned = false; while (drv_rx_counter != fw_rx_counter) { buf_size = 0; rx_counter = drv_rx_counter; while (rx_counter != fw_rx_counter) { pkt_length = wl1271_rx_get_buf_size(status, rx_counter); if (buf_size + pkt_length > WL1271_AGGR_BUFFER_SIZE) break; buf_size += pkt_length; rx_counter++; rx_counter &= NUM_RX_PKT_DESC_MOD_MASK; } if (buf_size == 0) { wl1271_warning("received empty data"); break; } if (wl->chip.id != CHIP_ID_1283_PG20) { /* * Choose the block we want to read * For aggregated packets, only the first memory block * should be retrieved. The FW takes care of the rest. */ mem_block = wl1271_rx_get_mem_block(status, drv_rx_counter); wl->rx_mem_pool_addr.addr = (mem_block << 8) + le32_to_cpu(wl_mem_map->packet_memory_pool_start); wl->rx_mem_pool_addr.addr_extra = wl->rx_mem_pool_addr.addr + 4; wl1271_write(wl, WL1271_SLV_REG_DATA, &wl->rx_mem_pool_addr, sizeof(wl->rx_mem_pool_addr), false); } /* Read all available packets at once */ wl1271_read(wl, WL1271_SLV_MEM_DATA, wl->aggr_buf, buf_size, true); /* Split data into separate packets */ pkt_offset = 0; while (pkt_offset < buf_size) { pkt_length = wl1271_rx_get_buf_size(status, drv_rx_counter); unaligned = wl1271_rx_get_unaligned(status, drv_rx_counter); /* * the handle data call can only fail in memory-outage * conditions, in that case the received frame will just * be dropped. */ if (wl1271_rx_handle_data(wl, wl->aggr_buf + pkt_offset, pkt_length, unaligned) == 1) had_data = true; wl->rx_counter++; drv_rx_counter++; drv_rx_counter &= NUM_RX_PKT_DESC_MOD_MASK; pkt_offset += pkt_length; } } /* * Write the driver's packet counter to the FW. This is only required * for older hardware revisions */ if (wl->quirks & WL12XX_QUIRK_END_OF_TRANSACTION) wl1271_write32(wl, RX_DRIVER_COUNTER_ADDRESS, wl->rx_counter); if (!is_ap && wl->conf.rx_streaming.interval && had_data && (wl->conf.rx_streaming.always || test_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags))) { u32 timeout = wl->conf.rx_streaming.duration; /* restart rx streaming */ if (!test_bit(WL1271_FLAG_RX_STREAMING_STARTED, &wl->flags)) ieee80211_queue_work(wl->hw, &wl->rx_streaming_enable_work); mod_timer(&wl->rx_streaming_timer, jiffies + msecs_to_jiffies(timeout)); } }