From 30e553e3ea3572bee3118fcde36e043c0cb2174c Mon Sep 17 00:00:00 2001 From: Tomas Winkler Date: Thu, 29 May 2008 16:35:16 +0800 Subject: [PATCH] iwlwifi: move aggregation code to iwl-tx.c This patch moves aggregation action code to iwl-tx.c in iwlcore. Signed-off-by: Tomas Winkler Signed-off-by: John W. Linville --- drivers/net/wireless/iwlwifi/iwl-4965.c | 224 +++--------------------- drivers/net/wireless/iwlwifi/iwl-5000.c | 4 +- drivers/net/wireless/iwlwifi/iwl-core.h | 14 +- drivers/net/wireless/iwlwifi/iwl-prph.h | 6 +- drivers/net/wireless/iwlwifi/iwl-tx.c | 190 ++++++++++++++++++++ 5 files changed, 228 insertions(+), 210 deletions(-) diff --git a/drivers/net/wireless/iwlwifi/iwl-4965.c b/drivers/net/wireless/iwlwifi/iwl-4965.c index b719d19361a..556e59ef70e 100644 --- a/drivers/net/wireless/iwlwifi/iwl-4965.c +++ b/drivers/net/wireless/iwlwifi/iwl-4965.c @@ -55,30 +55,6 @@ static struct iwl_mod_params iwl4965_mod_params = { /* the rest are 0 by default */ }; -#ifdef CONFIG_IWL4965_HT - -static const u16 default_tid_to_tx_fifo[] = { - IWL_TX_FIFO_AC1, - IWL_TX_FIFO_AC0, - IWL_TX_FIFO_AC0, - IWL_TX_FIFO_AC1, - IWL_TX_FIFO_AC2, - IWL_TX_FIFO_AC2, - IWL_TX_FIFO_AC3, - IWL_TX_FIFO_AC3, - IWL_TX_FIFO_NONE, - IWL_TX_FIFO_NONE, - IWL_TX_FIFO_NONE, - IWL_TX_FIFO_NONE, - IWL_TX_FIFO_NONE, - IWL_TX_FIFO_NONE, - IWL_TX_FIFO_NONE, - IWL_TX_FIFO_NONE, - IWL_TX_FIFO_AC3 -}; - -#endif /*CONFIG_IWL4965_HT */ - /* check contents of special bootstrap uCode SRAM */ static int iwl4965_verify_bsm(struct iwl_priv *priv) { @@ -2986,8 +2962,8 @@ static void iwl4965_tx_queue_stop_scheduler(struct iwl_priv *priv, * txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID * priv->lock must be held by the caller */ -static int iwl4965_tx_queue_agg_disable(struct iwl_priv *priv, u16 txq_id, - u16 ssn_idx, u8 tx_fifo) +static int iwl4965_txq_agg_disable(struct iwl_priv *priv, u16 txq_id, + u16 ssn_idx, u8 tx_fifo) { int ret = 0; @@ -3019,39 +2995,6 @@ static int iwl4965_tx_queue_agg_disable(struct iwl_priv *priv, u16 txq_id, return 0; } -int iwl4965_check_empty_hw_queue(struct iwl_priv *priv, int sta_id, - u8 tid, int txq_id) -{ - struct iwl_queue *q = &priv->txq[txq_id].q; - u8 *addr = priv->stations[sta_id].sta.sta.addr; - struct iwl_tid_data *tid_data = &priv->stations[sta_id].tid[tid]; - - switch (priv->stations[sta_id].tid[tid].agg.state) { - case IWL_EMPTYING_HW_QUEUE_DELBA: - /* We are reclaiming the last packet of the */ - /* aggregated HW queue */ - if (txq_id == tid_data->agg.txq_id && - q->read_ptr == q->write_ptr) { - u16 ssn = SEQ_TO_SN(tid_data->seq_number); - int tx_fifo = default_tid_to_tx_fifo[tid]; - IWL_DEBUG_HT("HW queue empty: continue DELBA flow\n"); - iwl4965_tx_queue_agg_disable(priv, txq_id, - ssn, tx_fifo); - tid_data->agg.state = IWL_AGG_OFF; - ieee80211_stop_tx_ba_cb_irqsafe(priv->hw, addr, tid); - } - break; - case IWL_EMPTYING_HW_QUEUE_ADDBA: - /* We are reclaiming the last packet of the queue */ - if (tid_data->tfds_in_queue == 0) { - IWL_DEBUG_HT("HW queue empty: continue ADDBA flow\n"); - tid_data->agg.state = IWL_AGG_ON; - ieee80211_start_tx_ba_cb_irqsafe(priv->hw, addr, tid); - } - break; - } - return 0; -} /** * iwl4965_rx_reply_compressed_ba - Handler for REPLY_COMPRESSED_BA @@ -3122,8 +3065,9 @@ static void iwl4965_rx_reply_compressed_ba(struct iwl_priv *priv, priv->mac80211_registered && agg->state != IWL_EMPTYING_HW_QUEUE_DELBA) ieee80211_wake_queue(priv->hw, ampdu_q); - iwl4965_check_empty_hw_queue(priv, ba_resp->sta_id, - ba_resp->tid, scd_flow); + + iwl_txq_check_empty(priv, ba_resp->sta_id, + ba_resp->tid, scd_flow); } } @@ -3137,7 +3081,7 @@ static int iwl4965_tx_queue_set_q2ratid(struct iwl_priv *priv, u16 ra_tid, u32 tbl_dw; u16 scd_q2ratid; - scd_q2ratid = ra_tid & IWL49_SCD_QUEUE_RA_TID_MAP_RATID_MSK; + scd_q2ratid = ra_tid & IWL_SCD_QUEUE_RA_TID_MAP_RATID_MSK; tbl_dw_addr = priv->scd_base_addr + IWL49_SCD_TRANSLATE_TBL_OFFSET_QUEUE(txq_id); @@ -3161,12 +3105,11 @@ static int iwl4965_tx_queue_set_q2ratid(struct iwl_priv *priv, u16 ra_tid, * NOTE: txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID, * i.e. it must be one of the higher queues used for aggregation */ -static int iwl4965_tx_queue_agg_enable(struct iwl_priv *priv, int txq_id, - int tx_fifo, int sta_id, int tid, - u16 ssn_idx) +static int iwl4965_txq_agg_enable(struct iwl_priv *priv, int txq_id, + int tx_fifo, int sta_id, int tid, u16 ssn_idx) { unsigned long flags; - int rc; + int ret; u16 ra_tid; if (IWL_BACK_QUEUE_FIRST_ID > txq_id) @@ -3179,10 +3122,10 @@ static int iwl4965_tx_queue_agg_enable(struct iwl_priv *priv, int txq_id, iwl_sta_modify_enable_tid_tx(priv, sta_id, tid); spin_lock_irqsave(&priv->lock, flags); - rc = iwl_grab_nic_access(priv); - if (rc) { + ret = iwl_grab_nic_access(priv); + if (ret) { spin_unlock_irqrestore(&priv->lock, flags); - return rc; + return ret; } /* Stop this Tx queue before configuring it */ @@ -3269,137 +3212,6 @@ static int iwl4965_rx_agg_stop(struct iwl_priv *priv, CMD_ASYNC); } -/* - * Find first available (lowest unused) Tx Queue, mark it "active". - * Called only when finding queue for aggregation. - * Should never return anything < 7, because they should already - * be in use as EDCA AC (0-3), Command (4), HCCA (5, 6). - */ -static int iwl4965_txq_ctx_activate_free(struct iwl_priv *priv) -{ - int txq_id; - - for (txq_id = 0; txq_id < priv->hw_params.max_txq_num; txq_id++) - if (!test_and_set_bit(txq_id, &priv->txq_ctx_active_msk)) - return txq_id; - return -1; -} - -static int iwl4965_tx_agg_start(struct ieee80211_hw *hw, const u8 *ra, - u16 tid, u16 *start_seq_num) -{ - struct iwl_priv *priv = hw->priv; - int sta_id; - int tx_fifo; - int txq_id; - int ssn = -1; - int ret = 0; - unsigned long flags; - struct iwl_tid_data *tid_data; - DECLARE_MAC_BUF(mac); - - if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo))) - tx_fifo = default_tid_to_tx_fifo[tid]; - else - return -EINVAL; - - IWL_WARNING("%s on ra = %s tid = %d\n", - __func__, print_mac(mac, ra), tid); - - sta_id = iwl_find_station(priv, ra); - if (sta_id == IWL_INVALID_STATION) - return -ENXIO; - - if (priv->stations[sta_id].tid[tid].agg.state != IWL_AGG_OFF) { - IWL_ERROR("Start AGG when state is not IWL_AGG_OFF !\n"); - return -ENXIO; - } - - txq_id = iwl4965_txq_ctx_activate_free(priv); - if (txq_id == -1) - return -ENXIO; - - spin_lock_irqsave(&priv->sta_lock, flags); - tid_data = &priv->stations[sta_id].tid[tid]; - ssn = SEQ_TO_SN(tid_data->seq_number); - tid_data->agg.txq_id = txq_id; - spin_unlock_irqrestore(&priv->sta_lock, flags); - - *start_seq_num = ssn; - ret = iwl4965_tx_queue_agg_enable(priv, txq_id, tx_fifo, - sta_id, tid, ssn); - if (ret) - return ret; - - ret = 0; - if (tid_data->tfds_in_queue == 0) { - printk(KERN_ERR "HW queue is empty\n"); - tid_data->agg.state = IWL_AGG_ON; - ieee80211_start_tx_ba_cb_irqsafe(hw, ra, tid); - } else { - IWL_DEBUG_HT("HW queue is NOT empty: %d packets in HW queue\n", - tid_data->tfds_in_queue); - tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA; - } - return ret; -} - -static int iwl4965_tx_agg_stop(struct ieee80211_hw *hw, const u8 *ra, u16 tid) -{ - struct iwl_priv *priv = hw->priv; - int tx_fifo_id, txq_id, sta_id, ssn = -1; - struct iwl_tid_data *tid_data; - int ret, write_ptr, read_ptr; - unsigned long flags; - DECLARE_MAC_BUF(mac); - - if (!ra) { - IWL_ERROR("ra = NULL\n"); - return -EINVAL; - } - - if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo))) - tx_fifo_id = default_tid_to_tx_fifo[tid]; - else - return -EINVAL; - - sta_id = iwl_find_station(priv, ra); - - if (sta_id == IWL_INVALID_STATION) - return -ENXIO; - - if (priv->stations[sta_id].tid[tid].agg.state != IWL_AGG_ON) - IWL_WARNING("Stopping AGG while state not IWL_AGG_ON\n"); - - tid_data = &priv->stations[sta_id].tid[tid]; - ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4; - txq_id = tid_data->agg.txq_id; - write_ptr = priv->txq[txq_id].q.write_ptr; - read_ptr = priv->txq[txq_id].q.read_ptr; - - /* The queue is not empty */ - if (write_ptr != read_ptr) { - IWL_DEBUG_HT("Stopping a non empty AGG HW QUEUE\n"); - priv->stations[sta_id].tid[tid].agg.state = - IWL_EMPTYING_HW_QUEUE_DELBA; - return 0; - } - - IWL_DEBUG_HT("HW queue is empty\n"); - priv->stations[sta_id].tid[tid].agg.state = IWL_AGG_OFF; - - spin_lock_irqsave(&priv->lock, flags); - ret = iwl4965_tx_queue_agg_disable(priv, txq_id, ssn, tx_fifo_id); - spin_unlock_irqrestore(&priv->lock, flags); - - if (ret) - return ret; - - ieee80211_stop_tx_ba_cb_irqsafe(priv->hw, ra, tid); - - return 0; -} - int iwl4965_mac_ampdu_action(struct ieee80211_hw *hw, enum ieee80211_ampdu_mlme_action action, const u8 *addr, u16 tid, u16 *ssn) @@ -3419,10 +3231,10 @@ int iwl4965_mac_ampdu_action(struct ieee80211_hw *hw, return iwl4965_rx_agg_stop(priv, addr, tid); case IEEE80211_AMPDU_TX_START: IWL_DEBUG_HT("start Tx\n"); - return iwl4965_tx_agg_start(hw, addr, tid, ssn); + return iwl_tx_agg_start(priv, addr, tid, ssn); case IEEE80211_AMPDU_TX_STOP: IWL_DEBUG_HT("stop Tx\n"); - return iwl4965_tx_agg_stop(hw, addr, tid); + return iwl_tx_agg_stop(priv, addr, tid); default: IWL_DEBUG_HT("unknown\n"); return -EINVAL; @@ -3670,7 +3482,7 @@ static void iwl4965_rx_reply_tx(struct iwl_priv *priv, else ieee80211_wake_queue(priv->hw, ampdu_q); } - iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id); + iwl_txq_check_empty(priv, sta_id, tid, txq_id); } } else { #endif /* CONFIG_IWL4965_HT */ @@ -3695,7 +3507,7 @@ static void iwl4965_rx_reply_tx(struct iwl_priv *priv, (txq_id >= 0) && priv->mac80211_registered) ieee80211_wake_queue(priv->hw, txq_id); if (tid != MAX_TID_COUNT) - iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id); + iwl_txq_check_empty(priv, sta_id, tid, txq_id); } } #endif /* CONFIG_IWL4965_HT */ @@ -3761,6 +3573,10 @@ static struct iwl_lib_ops iwl4965_lib = { .shared_mem_rx_idx = iwl4965_shared_mem_rx_idx, .txq_update_byte_cnt_tbl = iwl4965_txq_update_byte_cnt_tbl, .txq_set_sched = iwl4965_txq_set_sched, +#ifdef CONFIG_IWL4965_HT + .txq_agg_enable = iwl4965_txq_agg_enable, + .txq_agg_disable = iwl4965_txq_agg_disable, +#endif .rx_handler_setup = iwl4965_rx_handler_setup, .is_valid_rtc_data_addr = iwl4965_hw_valid_rtc_data_addr, .alive_notify = iwl4965_alive_notify, diff --git a/drivers/net/wireless/iwlwifi/iwl-5000.c b/drivers/net/wireless/iwlwifi/iwl-5000.c index 217c6a9596c..9ef4468327a 100644 --- a/drivers/net/wireless/iwlwifi/iwl-5000.c +++ b/drivers/net/wireless/iwlwifi/iwl-5000.c @@ -1193,7 +1193,7 @@ static void iwl5000_rx_reply_tx(struct iwl_priv *priv, else ieee80211_wake_queue(priv->hw, ampdu_q); } - iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id); + iwl_txq_check_empty(priv, sta_id, tid, txq_id); } } else { #endif /* CONFIG_IWL4965_HT */ @@ -1218,7 +1218,7 @@ static void iwl5000_rx_reply_tx(struct iwl_priv *priv, (txq_id >= 0) && priv->mac80211_registered) ieee80211_wake_queue(priv->hw, txq_id); if (tid != MAX_TID_COUNT) - iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id); + iwl_txq_check_empty(priv, sta_id, tid, txq_id); } } #endif /* CONFIG_IWL4965_HT */ diff --git a/drivers/net/wireless/iwlwifi/iwl-core.h b/drivers/net/wireless/iwlwifi/iwl-core.h index 1941a9184aa..004c6844400 100644 --- a/drivers/net/wireless/iwlwifi/iwl-core.h +++ b/drivers/net/wireless/iwlwifi/iwl-core.h @@ -104,15 +104,22 @@ struct iwl_lib_ops { int (*alloc_shared_mem)(struct iwl_priv *priv); void (*free_shared_mem)(struct iwl_priv *priv); int (*shared_mem_rx_idx)(struct iwl_priv *priv); + /* Handling TX */ void (*txq_update_byte_cnt_tbl)(struct iwl_priv *priv, struct iwl_tx_queue *txq, u16 byte_cnt); void (*txq_inval_byte_cnt_tbl)(struct iwl_priv *priv, struct iwl_tx_queue *txq); void (*txq_set_sched)(struct iwl_priv *priv, u32 mask); +#ifdef CONFIG_IWL4965_HT + /* aggregations */ + int (*txq_agg_enable)(struct iwl_priv *priv, int txq_id, int tx_fifo, + int sta_id, int tid, u16 ssn_idx); + int (*txq_agg_disable)(struct iwl_priv *priv, u16 txq_id, u16 ssn_idx, + u8 tx_fifo); +#endif /* CONFIG_IWL4965_HT */ /* setup Rx handler */ void (*rx_handler_setup)(struct iwl_priv *priv); - /* nic Tx fifo handling */ /* alive notification after init uCode load */ void (*init_alive_start)(struct iwl_priv *priv); /* alive notification */ @@ -226,6 +233,11 @@ void iwl_hw_txq_ctx_free(struct iwl_priv *priv); int iwl_hw_txq_attach_buf_to_tfd(struct iwl_priv *priv, void *tfd, dma_addr_t addr, u16 len); int iwl_txq_update_write_ptr(struct iwl_priv *priv, struct iwl_tx_queue *txq); +#ifdef CONFIG_IWL4965_HT +int iwl_tx_agg_start(struct iwl_priv *priv, const u8 *ra, u16 tid, u16 *ssn); +int iwl_tx_agg_stop(struct iwl_priv *priv , const u8 *ra, u16 tid); +int iwl_txq_check_empty(struct iwl_priv *priv, int sta_id, u8 tid, int txq_id); +#endif /***************************************************** * S e n d i n g H o s t C o m m a n d s * diff --git a/drivers/net/wireless/iwlwifi/iwl-prph.h b/drivers/net/wireless/iwlwifi/iwl-prph.h index 15cb7ff4f7a..70d9c7568b9 100644 --- a/drivers/net/wireless/iwlwifi/iwl-prph.h +++ b/drivers/net/wireless/iwlwifi/iwl-prph.h @@ -507,9 +507,9 @@ #define IWL49_SCD_TRANSLATE_TBL_OFFSET_QUEUE(x) \ ((IWL49_SCD_TRANSLATE_TBL_OFFSET + ((x) * 2)) & 0xfffffffc) -#define IWL49_SCD_TXFIFO_POS_TID (0) -#define IWL49_SCD_TXFIFO_POS_RA (4) -#define IWL49_SCD_QUEUE_RA_TID_MAP_RATID_MSK (0x01FF) +#define IWL_SCD_TXFIFO_POS_TID (0) +#define IWL_SCD_TXFIFO_POS_RA (4) +#define IWL_SCD_QUEUE_RA_TID_MAP_RATID_MSK (0x01FF) /* 5000 SCD */ #define IWL50_SCD_QUEUE_STTS_REG_POS_TXF (0) diff --git a/drivers/net/wireless/iwlwifi/iwl-tx.c b/drivers/net/wireless/iwlwifi/iwl-tx.c index 224bcec21e5..cfe6f4b233d 100644 --- a/drivers/net/wireless/iwlwifi/iwl-tx.c +++ b/drivers/net/wireless/iwlwifi/iwl-tx.c @@ -36,6 +36,32 @@ #include "iwl-io.h" #include "iwl-helpers.h" +#ifdef CONFIG_IWL4965_HT + +static const u16 default_tid_to_tx_fifo[] = { + IWL_TX_FIFO_AC1, + IWL_TX_FIFO_AC0, + IWL_TX_FIFO_AC0, + IWL_TX_FIFO_AC1, + IWL_TX_FIFO_AC2, + IWL_TX_FIFO_AC2, + IWL_TX_FIFO_AC3, + IWL_TX_FIFO_AC3, + IWL_TX_FIFO_NONE, + IWL_TX_FIFO_NONE, + IWL_TX_FIFO_NONE, + IWL_TX_FIFO_NONE, + IWL_TX_FIFO_NONE, + IWL_TX_FIFO_NONE, + IWL_TX_FIFO_NONE, + IWL_TX_FIFO_NONE, + IWL_TX_FIFO_AC3 +}; + +#endif /*CONFIG_IWL4965_HT */ + + + /** * iwl_hw_txq_free_tfd - Free all chunks referenced by TFD [txq->q.read_ptr] * @@ -1171,6 +1197,170 @@ void iwl_tx_cmd_complete(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb) EXPORT_SYMBOL(iwl_tx_cmd_complete); +#ifdef CONFIG_IWL4965_HT +/* + * Find first available (lowest unused) Tx Queue, mark it "active". + * Called only when finding queue for aggregation. + * Should never return anything < 7, because they should already + * be in use as EDCA AC (0-3), Command (4), HCCA (5, 6). + */ +static int iwl_txq_ctx_activate_free(struct iwl_priv *priv) +{ + int txq_id; + + for (txq_id = 0; txq_id < priv->hw_params.max_txq_num; txq_id++) + if (!test_and_set_bit(txq_id, &priv->txq_ctx_active_msk)) + return txq_id; + return -1; +} + +int iwl_tx_agg_start(struct iwl_priv *priv, const u8 *ra, u16 tid, u16 *ssn) +{ + int sta_id; + int tx_fifo; + int txq_id; + int ret; + unsigned long flags; + struct iwl_tid_data *tid_data; + DECLARE_MAC_BUF(mac); + + if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo))) + tx_fifo = default_tid_to_tx_fifo[tid]; + else + return -EINVAL; + + IWL_WARNING("%s on ra = %s tid = %d\n", + __func__, print_mac(mac, ra), tid); + + sta_id = iwl_find_station(priv, ra); + if (sta_id == IWL_INVALID_STATION) + return -ENXIO; + + if (priv->stations[sta_id].tid[tid].agg.state != IWL_AGG_OFF) { + IWL_ERROR("Start AGG when state is not IWL_AGG_OFF !\n"); + return -ENXIO; + } + + txq_id = iwl_txq_ctx_activate_free(priv); + if (txq_id == -1) + return -ENXIO; + + spin_lock_irqsave(&priv->sta_lock, flags); + tid_data = &priv->stations[sta_id].tid[tid]; + *ssn = SEQ_TO_SN(tid_data->seq_number); + tid_data->agg.txq_id = txq_id; + spin_unlock_irqrestore(&priv->sta_lock, flags); + + ret = priv->cfg->ops->lib->txq_agg_enable(priv, txq_id, tx_fifo, + sta_id, tid, *ssn); + if (ret) + return ret; + + if (tid_data->tfds_in_queue == 0) { + printk(KERN_ERR "HW queue is empty\n"); + tid_data->agg.state = IWL_AGG_ON; + ieee80211_start_tx_ba_cb_irqsafe(priv->hw, ra, tid); + } else { + IWL_DEBUG_HT("HW queue is NOT empty: %d packets in HW queue\n", + tid_data->tfds_in_queue); + tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA; + } + return ret; +} +EXPORT_SYMBOL(iwl_tx_agg_start); + +int iwl_tx_agg_stop(struct iwl_priv *priv , const u8 *ra, u16 tid) +{ + int tx_fifo_id, txq_id, sta_id, ssn = -1; + struct iwl_tid_data *tid_data; + int ret, write_ptr, read_ptr; + unsigned long flags; + DECLARE_MAC_BUF(mac); + + if (!ra) { + IWL_ERROR("ra = NULL\n"); + return -EINVAL; + } + + if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo))) + tx_fifo_id = default_tid_to_tx_fifo[tid]; + else + return -EINVAL; + + sta_id = iwl_find_station(priv, ra); + + if (sta_id == IWL_INVALID_STATION) + return -ENXIO; + + if (priv->stations[sta_id].tid[tid].agg.state != IWL_AGG_ON) + IWL_WARNING("Stopping AGG while state not IWL_AGG_ON\n"); + + tid_data = &priv->stations[sta_id].tid[tid]; + ssn = (tid_data->seq_number & IEEE80211_SCTL_SEQ) >> 4; + txq_id = tid_data->agg.txq_id; + write_ptr = priv->txq[txq_id].q.write_ptr; + read_ptr = priv->txq[txq_id].q.read_ptr; + + /* The queue is not empty */ + if (write_ptr != read_ptr) { + IWL_DEBUG_HT("Stopping a non empty AGG HW QUEUE\n"); + priv->stations[sta_id].tid[tid].agg.state = + IWL_EMPTYING_HW_QUEUE_DELBA; + return 0; + } + + IWL_DEBUG_HT("HW queue is empty\n"); + priv->stations[sta_id].tid[tid].agg.state = IWL_AGG_OFF; + + spin_lock_irqsave(&priv->lock, flags); + ret = priv->cfg->ops->lib->txq_agg_disable(priv, txq_id, ssn, + tx_fifo_id); + spin_unlock_irqrestore(&priv->lock, flags); + + if (ret) + return ret; + + ieee80211_stop_tx_ba_cb_irqsafe(priv->hw, ra, tid); + + return 0; +} +EXPORT_SYMBOL(iwl_tx_agg_stop); + +int iwl_txq_check_empty(struct iwl_priv *priv, int sta_id, u8 tid, int txq_id) +{ + struct iwl_queue *q = &priv->txq[txq_id].q; + u8 *addr = priv->stations[sta_id].sta.sta.addr; + struct iwl_tid_data *tid_data = &priv->stations[sta_id].tid[tid]; + + switch (priv->stations[sta_id].tid[tid].agg.state) { + case IWL_EMPTYING_HW_QUEUE_DELBA: + /* We are reclaiming the last packet of the */ + /* aggregated HW queue */ + if (txq_id == tid_data->agg.txq_id && + q->read_ptr == q->write_ptr) { + u16 ssn = SEQ_TO_SN(tid_data->seq_number); + int tx_fifo = default_tid_to_tx_fifo[tid]; + IWL_DEBUG_HT("HW queue empty: continue DELBA flow\n"); + priv->cfg->ops->lib->txq_agg_disable(priv, txq_id, + ssn, tx_fifo); + tid_data->agg.state = IWL_AGG_OFF; + ieee80211_stop_tx_ba_cb_irqsafe(priv->hw, addr, tid); + } + break; + case IWL_EMPTYING_HW_QUEUE_ADDBA: + /* We are reclaiming the last packet of the queue */ + if (tid_data->tfds_in_queue == 0) { + IWL_DEBUG_HT("HW queue empty: continue ADDBA flow\n"); + tid_data->agg.state = IWL_AGG_ON; + ieee80211_start_tx_ba_cb_irqsafe(priv->hw, addr, tid); + } + break; + } + return 0; +} +EXPORT_SYMBOL(iwl_txq_check_empty); +#endif /* CONFIG_IWL4965_HT */ + #ifdef CONFIG_IWLWIF_DEBUG #define TX_STATUS_ENTRY(x) case TX_STATUS_FAIL_ ## x: return #x -- 2.20.1