From 9a3fcf912ef7f5c6e18f9af6875dd13f7311f7aa Mon Sep 17 00:00:00 2001 From: Sara Sharon Date: Tue, 14 Mar 2017 09:50:35 +0200 Subject: iwlwifi: mvm: cleanup pending frames in DQA mode When a station is asleep, the fw will set it as "asleep". All queues that are used only by one station will be stopped by the fw. In pre-DQA mode this was relevant for aggregation queues. However, in DQA mode a queue is owned by one station only, so all queues will be stopped. As a result, we don't expect to get filtered frames back to mac80211 and don't have to maintain the entire pending_frames state logic, the same way as we do in aggregations. The correct behavior is to align DQA behavior with the aggregation queue behaviour pre-DQA: - Don't count pending frames. - Let mac80211 know we have frames in these queues so that it can properly handle trigger frames. When a trigger frame is received, mac80211 tells the driver to send frames from the queues using release_buffered_frames. The driver will tell the fw to let frames out even if the station is asleep. This is done by iwl_mvm_sta_modify_sleep_tx_count. Reported-and-tested-by: Jens Axboe Reported-by: Linus Torvalds Signed-off-by: Sara Sharon Signed-off-by: Luca Coelho Signed-off-by: Kalle Valo --- drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c | 5 +-- drivers/net/wireless/intel/iwlwifi/mvm/sta.c | 11 +++--- drivers/net/wireless/intel/iwlwifi/mvm/sta.h | 2 +- drivers/net/wireless/intel/iwlwifi/mvm/tx.c | 41 ++++++++++------------- 4 files changed, 28 insertions(+), 31 deletions(-) (limited to 'drivers') diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c index d37b1695c64e..6927caecd48e 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c @@ -2319,7 +2319,7 @@ iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw, { struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw); - /* Called when we need to transmit (a) frame(s) from agg queue */ + /* Called when we need to transmit (a) frame(s) from agg or dqa queue */ iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames, tids, more_data, true); @@ -2338,7 +2338,8 @@ static void __iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw, for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) { struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid]; - if (tid_data->state != IWL_AGG_ON && + if (!iwl_mvm_is_dqa_supported(mvm) && + tid_data->state != IWL_AGG_ON && tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA) continue; diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/sta.c b/drivers/net/wireless/intel/iwlwifi/mvm/sta.c index bd1dcc863d8f..b51a2853cc80 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/sta.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/sta.c @@ -3135,7 +3135,7 @@ void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm, struct ieee80211_sta *sta, enum ieee80211_frame_release_type reason, u16 cnt, u16 tids, bool more_data, - bool agg) + bool single_sta_queue) { struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta); struct iwl_mvm_add_sta_cmd cmd = { @@ -3155,14 +3155,14 @@ void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm, for_each_set_bit(tid, &_tids, IWL_MAX_TID_COUNT) cmd.awake_acs |= BIT(tid_to_ucode_ac[tid]); - /* If we're releasing frames from aggregation queues then check if the - * all queues combined that we're releasing frames from have + /* If we're releasing frames from aggregation or dqa queues then check + * if all the queues that we're releasing frames from, combined, have: * - more frames than the service period, in which case more_data * needs to be set * - fewer than 'cnt' frames, in which case we need to adjust the * firmware command (but do that unconditionally) */ - if (agg) { + if (single_sta_queue) { int remaining = cnt; int sleep_tx_count; @@ -3172,7 +3172,8 @@ void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm, u16 n_queued; tid_data = &mvmsta->tid_data[tid]; - if (WARN(tid_data->state != IWL_AGG_ON && + if (WARN(!iwl_mvm_is_dqa_supported(mvm) && + tid_data->state != IWL_AGG_ON && tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA, "TID %d state is %d\n", tid, tid_data->state)) { diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/sta.h b/drivers/net/wireless/intel/iwlwifi/mvm/sta.h index 4be34f902278..1927ce607798 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/sta.h +++ b/drivers/net/wireless/intel/iwlwifi/mvm/sta.h @@ -547,7 +547,7 @@ void iwl_mvm_sta_modify_sleep_tx_count(struct iwl_mvm *mvm, struct ieee80211_sta *sta, enum ieee80211_frame_release_type reason, u16 cnt, u16 tids, bool more_data, - bool agg); + bool single_sta_queue); int iwl_mvm_drain_sta(struct iwl_mvm *mvm, struct iwl_mvm_sta *mvmsta, bool drain); void iwl_mvm_sta_modify_disable_tx(struct iwl_mvm *mvm, diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/tx.c b/drivers/net/wireless/intel/iwlwifi/mvm/tx.c index dd2b4a300819..3f37075f4cde 100644 --- a/drivers/net/wireless/intel/iwlwifi/mvm/tx.c +++ b/drivers/net/wireless/intel/iwlwifi/mvm/tx.c @@ -7,7 +7,7 @@ * * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH - * Copyright(c) 2016 Intel Deutschland GmbH + * Copyright(c) 2016 - 2017 Intel Deutschland GmbH * * This program is free software; you can redistribute it and/or modify * it under the terms of version 2 of the GNU General Public License as @@ -34,6 +34,7 @@ * * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH + * Copyright(c) 2016 - 2017 Intel Deutschland GmbH * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -628,8 +629,10 @@ int iwl_mvm_tx_skb_non_sta(struct iwl_mvm *mvm, struct sk_buff *skb) * values. * Note that we don't need to make sure it isn't agg'd, since we're * TXing non-sta + * For DQA mode - we shouldn't increase it though */ - atomic_inc(&mvm->pending_frames[sta_id]); + if (!iwl_mvm_is_dqa_supported(mvm)) + atomic_inc(&mvm->pending_frames[sta_id]); return 0; } @@ -1005,11 +1008,8 @@ static int iwl_mvm_tx_mpdu(struct iwl_mvm *mvm, struct sk_buff *skb, spin_unlock(&mvmsta->lock); - /* Increase pending frames count if this isn't AMPDU */ - if ((iwl_mvm_is_dqa_supported(mvm) && - mvmsta->tid_data[tx_cmd->tid_tspec].state != IWL_AGG_ON && - mvmsta->tid_data[tx_cmd->tid_tspec].state != IWL_AGG_STARTING) || - (!iwl_mvm_is_dqa_supported(mvm) && !is_ampdu)) + /* Increase pending frames count if this isn't AMPDU or DQA queue */ + if (!iwl_mvm_is_dqa_supported(mvm) && !is_ampdu) atomic_inc(&mvm->pending_frames[mvmsta->sta_id]); return 0; @@ -1079,12 +1079,13 @@ static void iwl_mvm_check_ratid_empty(struct iwl_mvm *mvm, lockdep_assert_held(&mvmsta->lock); if ((tid_data->state == IWL_AGG_ON || - tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA) && + tid_data->state == IWL_EMPTYING_HW_QUEUE_DELBA || + iwl_mvm_is_dqa_supported(mvm)) && iwl_mvm_tid_queued(tid_data) == 0) { /* - * Now that this aggregation queue is empty tell mac80211 so it - * knows we no longer have frames buffered for the station on - * this TID (for the TIM bitmap calculation.) + * Now that this aggregation or DQA queue is empty tell + * mac80211 so it knows we no longer have frames buffered for + * the station on this TID (for the TIM bitmap calculation.) */ ieee80211_sta_set_buffered(sta, tid, false); } @@ -1257,7 +1258,6 @@ static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm, u8 skb_freed = 0; u16 next_reclaimed, seq_ctl; bool is_ndp = false; - bool txq_agg = false; /* Is this TXQ aggregated */ __skb_queue_head_init(&skbs); @@ -1283,6 +1283,10 @@ static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm, info->flags |= IEEE80211_TX_STAT_ACK; break; case TX_STATUS_FAIL_DEST_PS: + /* In DQA, the FW should have stopped the queue and not + * return this status + */ + WARN_ON(iwl_mvm_is_dqa_supported(mvm)); info->flags |= IEEE80211_TX_STAT_TX_FILTERED; break; default: @@ -1387,15 +1391,6 @@ static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm, bool send_eosp_ndp = false; spin_lock_bh(&mvmsta->lock); - if (iwl_mvm_is_dqa_supported(mvm)) { - enum iwl_mvm_agg_state state; - - state = mvmsta->tid_data[tid].state; - txq_agg = (state == IWL_AGG_ON || - state == IWL_EMPTYING_HW_QUEUE_DELBA); - } else { - txq_agg = txq_id >= mvm->first_agg_queue; - } if (!is_ndp) { tid_data->next_reclaimed = next_reclaimed; @@ -1452,11 +1447,11 @@ static void iwl_mvm_rx_tx_cmd_single(struct iwl_mvm *mvm, * If the txq is not an AMPDU queue, there is no chance we freed * several skbs. Check that out... */ - if (txq_agg) + if (iwl_mvm_is_dqa_supported(mvm) || txq_id >= mvm->first_agg_queue) goto out; /* We can't free more than one frame at once on a shared queue */ - WARN_ON(!iwl_mvm_is_dqa_supported(mvm) && (skb_freed > 1)); + WARN_ON(skb_freed > 1); /* If we have still frames for this STA nothing to do here */ if (!atomic_sub_and_test(skb_freed, &mvm->pending_frames[sta_id])) -- cgit v1.2.3-59-g8ed1b