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iwlwifi: A-MPDU Tx conform flows to mac80211 

This patch alters the current iwlwifi behavior to fit the flows introduced
by the mac80211, mainly queues handling and start/stop call backs flows

Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Ron Rindjunsky 2008-01-28 14:07:24 +02:00 committed by John W. Linville
parent 8114fcf185
commit fe01b477bb
4 changed files with 304 additions and 223 deletions
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24
drivers/net/wireless/iwlwifi/iwl-4965-commands.h
View File

@ -1300,6 +1300,25 @@ struct iwl4965_tx_resp {
__le32 status; /* TX status (for aggregation status of 1st frame) */
} __attribute__ ((packed));
struct agg_tx_status {
__le16 status;
__le16 sequence;
} __attribute__ ((packed));
struct iwl4965_tx_resp_agg {
u8 frame_count; /* 1 no aggregation, >1 aggregation */
u8 reserved1;
u8 failure_rts;
u8 failure_frame;
__le32 rate_n_flags;
__le16 wireless_media_time;
__le16 reserved3;
__le32 pa_power1;
__le32 pa_power2;
struct agg_tx_status status; /* TX status (for aggregation status */
/* of 1st frame) */
} __attribute__ ((packed));
/*
* REPLY_COMPRESSED_BA = 0xc5 (response only, not a command)
*
@ -1313,9 +1332,8 @@ struct iwl4965_compressed_ba_resp {
/* Index of recipient (BA-sending) station in uCode's station table */
u8 sta_id;
u8 tid;
__le16 ba_seq_ctl;
__le32 ba_bitmap0;
__le32 ba_bitmap1;
__le16 seq_ctl;
__le64 bitmap;
__le16 scd_flow;
__le16 scd_ssn;
} __attribute__ ((packed));

360
drivers/net/wireless/iwlwifi/iwl-4965.c
View File

@ -79,6 +79,30 @@ const struct iwl4965_rate_info iwl4965_rates[IWL_RATE_COUNT] = {
IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
};
#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 */
static int is_fat_channel(__le32 rxon_flags)
{
return (rxon_flags & RXON_FLG_CHANNEL_MODE_PURE_40_MSK) ||
@ -4185,6 +4209,7 @@ static void iwl4965_set_tx_status(struct iwl4965_priv *priv, int txq_id, int idx
tx_status->control.tx_rate = rate;
}
#endif/* CONFIG_IWL4965_HT_AGG */
/**
* iwl4965_sta_modify_enable_tid_tx - Enable Tx for this TID in station table
@ -4204,7 +4229,6 @@ static void iwl4965_sta_modify_enable_tid_tx(struct iwl4965_priv *priv,
iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
}
/**
* iwl4965_tx_status_reply_compressed_ba - Update tx status from block-ack
*
@ -4218,10 +4242,11 @@ static int iwl4965_tx_status_reply_compressed_ba(struct iwl4965_priv *priv,
{
int i, sh, ack;
u16 ba_seq_ctl = le16_to_cpu(ba_resp->ba_seq_ctl);
u32 bitmap0, bitmap1;
u32 resp_bitmap0 = le32_to_cpu(ba_resp->ba_bitmap0);
u32 resp_bitmap1 = le32_to_cpu(ba_resp->ba_bitmap1);
u16 seq_ctl = le16_to_cpu(ba_resp->seq_ctl);
u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
u64 bitmap;
int successes = 0;
struct ieee80211_tx_status *tx_status;
if (unlikely(!agg->wait_for_ba)) {
IWL_ERROR("Received BA when not expected\n");
@ -4230,17 +4255,15 @@ static int iwl4965_tx_status_reply_compressed_ba(struct iwl4965_priv *priv,
/* Mark that the expected block-ack response arrived */
agg->wait_for_ba = 0;
IWL_DEBUG_TX_REPLY("BA %d %d\n", agg->start_idx, ba_resp->ba_seq_ctl);
IWL_DEBUG_TX_REPLY("BA %d %d\n", agg->start_idx, ba_resp->seq_ctl);
/* Calculate shift to align block-ack bits with our Tx window bits */
sh = agg->start_idx - SEQ_TO_INDEX(ba_seq_ctl >> 4);
sh = agg->start_idx - SEQ_TO_INDEX(seq_ctl>>4);
if (sh < 0) /* tbw something is wrong with indices */
sh += 0x100;
/* don't use 64-bit values for now */
bitmap0 = resp_bitmap0 >> sh;
bitmap1 = resp_bitmap1 >> sh;
bitmap0 |= (resp_bitmap1 & ((1 << sh) | ((1 << sh) - 1))) << (32 - sh);
bitmap = le64_to_cpu(ba_resp->bitmap) >> sh;
if (agg->frame_count > (64 - sh)) {
IWL_DEBUG_TX_REPLY("more frames than bitmap size");
@ -4249,23 +4272,106 @@ static int iwl4965_tx_status_reply_compressed_ba(struct iwl4965_priv *priv,
/* check for success or failure according to the
* transmitted bitmap and block-ack bitmap */
bitmap0 &= agg->bitmap0;
bitmap1 &= agg->bitmap1;
bitmap &= agg->bitmap;
/* For each frame attempted in aggregation,
* update driver's record of tx frame's status. */
for (i = 0; i < agg->frame_count ; i++) {
int idx = (agg->start_idx + i) & 0xff;
ack = bitmap0 & (1 << i);
ack = bitmap & (1 << i);
successes += !!ack;
IWL_DEBUG_TX_REPLY("%s ON i=%d idx=%d raw=%d\n",
ack? "ACK":"NACK", i, idx, agg->start_idx + i);
iwl4965_set_tx_status(priv, agg->txq_id, idx, ack, 0,
agg->rate_n_flags);
ack? "ACK":"NACK", i, (agg->start_idx + i) & 0xff,
agg->start_idx + i);
}
IWL_DEBUG_TX_REPLY("Bitmap %x%x\n", bitmap0, bitmap1);
tx_status = &priv->txq[scd_flow].txb[agg->start_idx].status;
tx_status->flags = IEEE80211_TX_STATUS_ACK;
tx_status->retry_count++;
#ifdef CONFIG_IWL4965_HT_AGG
tx_status->flags |= IEEE80211_TX_STATUS_AGG_STATS;
tx_status->successes = successes;
tx_status->frame_count = agg->frame_count;
#endif /* CONFIG_IWL4965_HT_AGG */
tx_status->control.tx_rate = agg->rate_n_flags;
IWL_DEBUG_TX_REPLY("Bitmap %llx\n", bitmap);
return 0;
}
/**
* iwl4965_tx_queue_stop_scheduler - Stop queue, but keep configuration
*/
static void iwl4965_tx_queue_stop_scheduler(struct iwl4965_priv *priv,
u16 txq_id)
{
/* Simply stop the queue, but don't change any configuration;
* the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */
iwl4965_write_prph(priv,
KDR_SCD_QUEUE_STATUS_BITS(txq_id),
(0 << SCD_QUEUE_STTS_REG_POS_ACTIVE)|
(1 << SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN));
}
/**
* txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID
*/
static int iwl4965_tx_queue_agg_disable(struct iwl4965_priv *priv, u16 txq_id,
u16 ssn_idx, u8 tx_fifo)
{
if (IWL_BACK_QUEUE_FIRST_ID > txq_id) {
IWL_WARNING("queue number too small: %d, must be > %d\n",
txq_id, IWL_BACK_QUEUE_FIRST_ID);
return -EINVAL;
}
iwl4965_tx_queue_stop_scheduler(priv, txq_id);
iwl4965_clear_bits_prph(priv, KDR_SCD_QUEUECHAIN_SEL, (1 << txq_id));
priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
/* supposes that ssn_idx is valid (!= 0xFFF) */
iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
iwl4965_clear_bits_prph(priv, KDR_SCD_INTERRUPT_MASK, (1 << txq_id));
iwl4965_txq_ctx_deactivate(priv, txq_id);
iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 0);
return 0;
}
int iwl4965_check_empty_hw_queue(struct iwl4965_priv *priv, int sta_id,
u8 tid, int txq_id)
{
struct iwl4965_queue *q = &priv->txq[txq_id].q;
u8 *addr = priv->stations[sta_id].sta.sta.addr;
struct iwl4965_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;
}
@ -4293,48 +4399,43 @@ static void iwl4965_rx_reply_compressed_ba(struct iwl4965_priv *priv,
int index;
struct iwl4965_tx_queue *txq = NULL;
struct iwl4965_ht_agg *agg;
DECLARE_MAC_BUF(mac);
/* "flow" corresponds to Tx queue */
u16 ba_resp_scd_flow = le16_to_cpu(ba_resp->scd_flow);
u16 scd_flow = le16_to_cpu(ba_resp->scd_flow);
/* "ssn" is start of block-ack Tx window, corresponds to index
* (in Tx queue's circular buffer) of first TFD/frame in window */
u16 ba_resp_scd_ssn = le16_to_cpu(ba_resp->scd_ssn);
if (ba_resp_scd_flow >= ARRAY_SIZE(priv->txq)) {
if (scd_flow >= ARRAY_SIZE(priv->txq)) {
IWL_ERROR("BUG_ON scd_flow is bigger than number of queues");
return;
}
txq = &priv->txq[ba_resp_scd_flow];
txq = &priv->txq[scd_flow];
agg = &priv->stations[ba_resp->sta_id].tid[ba_resp->tid].agg;
/* Find index just before block-ack window */
index = iwl4965_queue_dec_wrap(ba_resp_scd_ssn & 0xff, txq->q.n_bd);
/* TODO: Need to get this copy more safely - now good for debug */
/*
{
DECLARE_MAC_BUF(mac);
IWL_DEBUG_TX_REPLY("REPLY_COMPRESSED_BA [%d]Received from %s, "
"sta_id = %d\n",
agg->wait_for_ba,
print_mac(mac, (u8*) &ba_resp->sta_addr_lo32),
ba_resp->sta_id);
IWL_DEBUG_TX_REPLY("TID = %d, SeqCtl = %d, bitmap = 0x%X%X, scd_flow = "
IWL_DEBUG_TX_REPLY("TID = %d, SeqCtl = %d, bitmap = 0x%llx, scd_flow = "
"%d, scd_ssn = %d\n",
ba_resp->tid,
ba_resp->ba_seq_ctl,
ba_resp->ba_bitmap1,
ba_resp->ba_bitmap0,
ba_resp->seq_ctl,
ba_resp->bitmap,
ba_resp->scd_flow,
ba_resp->scd_ssn);
IWL_DEBUG_TX_REPLY("DAT start_idx = %d, bitmap = 0x%X%X \n",
IWL_DEBUG_TX_REPLY("DAT start_idx = %d, bitmap = 0x%llx \n",
agg->start_idx,
agg->bitmap1,
agg->bitmap0);
}
*/
agg->bitmap);
/* Update driver's record of ACK vs. not for each frame in window */
iwl4965_tx_status_reply_compressed_ba(priv, agg, ba_resp);
@ -4342,23 +4443,17 @@ static void iwl4965_rx_reply_compressed_ba(struct iwl4965_priv *priv,
/* Release all TFDs before the SSN, i.e. all TFDs in front of
* block-ack window (we assume that they've been successfully
* transmitted ... if not, it's too late anyway). */
if (txq->q.read_ptr != (ba_resp_scd_ssn & 0xff))
iwl4965_tx_queue_reclaim(priv, ba_resp_scd_flow, index);
}
/**
* iwl4965_tx_queue_stop_scheduler - Stop queue, but keep configuration
*/
static void iwl4965_tx_queue_stop_scheduler(struct iwl4965_priv *priv, u16 txq_id)
{
/* Simply stop the queue, but don't change any configuration;
* the SCD_ACT_EN bit is the write-enable mask for the ACTIVE bit. */
iwl4965_write_prph(priv,
KDR_SCD_QUEUE_STATUS_BITS(txq_id),
(0 << SCD_QUEUE_STTS_REG_POS_ACTIVE)|
(1 << SCD_QUEUE_STTS_REG_POS_SCD_ACT_EN));
if (txq->q.read_ptr != (ba_resp_scd_ssn & 0xff)) {
int freed = iwl4965_tx_queue_reclaim(priv, scd_flow, index);
priv->stations[ba_resp->sta_id].
tid[ba_resp->tid].tfds_in_queue -= freed;
if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
priv->mac80211_registered &&
agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)
ieee80211_wake_queue(priv->hw, scd_flow);
iwl4965_check_empty_hw_queue(priv, ba_resp->sta_id,
ba_resp->tid, scd_flow);
}
}
/**
@ -4388,6 +4483,7 @@ static int iwl4965_tx_queue_set_q2ratid(struct iwl4965_priv *priv, u16 ra_tid,
return 0;
}
/**
* iwl4965_tx_queue_agg_enable - Set up & enable aggregation for selected queue
*
@ -4455,48 +4551,6 @@ static int iwl4965_tx_queue_agg_enable(struct iwl4965_priv *priv, int txq_id,
return 0;
}
/**
* txq_id must be greater than IWL_BACK_QUEUE_FIRST_ID
*/
static int iwl4965_tx_queue_agg_disable(struct iwl4965_priv *priv, u16 txq_id,
u16 ssn_idx, u8 tx_fifo)
{
unsigned long flags;
int rc;
if (IWL_BACK_QUEUE_FIRST_ID > txq_id) {
IWL_WARNING("queue number too small: %d, must be > %d\n",
txq_id, IWL_BACK_QUEUE_FIRST_ID);
return -EINVAL;
}
spin_lock_irqsave(&priv->lock, flags);
rc = iwl4965_grab_nic_access(priv);
if (rc) {
spin_unlock_irqrestore(&priv->lock, flags);
return rc;
}
iwl4965_tx_queue_stop_scheduler(priv, txq_id);
iwl4965_clear_bits_prph(priv, KDR_SCD_QUEUECHAIN_SEL, (1 << txq_id));
priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
/* supposes that ssn_idx is valid (!= 0xFFF) */
iwl4965_set_wr_ptrs(priv, txq_id, ssn_idx);
iwl4965_clear_bits_prph(priv, KDR_SCD_INTERRUPT_MASK, (1 << txq_id));
iwl4965_txq_ctx_deactivate(priv, txq_id);
iwl4965_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 0);
iwl4965_release_nic_access(priv);
spin_unlock_irqrestore(&priv->lock, flags);
return 0;
}
#endif/* CONFIG_IWL4965_HT_AGG */
#endif /* CONFIG_IWL4965_HT */
/**
@ -4730,28 +4784,6 @@ static void iwl4965_sta_modify_del_ba_tid(struct iwl4965_priv *priv,
iwl4965_send_add_station(priv, &priv->stations[sta_id].sta, CMD_ASYNC);
}
#ifdef CONFIG_IWL4965_HT_AGG
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
};
/*
* Find first available (lowest unused) Tx Queue, mark it "active".
* Called only when finding queue for aggregation.
@ -4768,69 +4800,78 @@ static int iwl4965_txq_ctx_activate_free(struct iwl4965_priv *priv)
return -1;
}
int iwl4965_mac_ht_tx_agg_start(struct ieee80211_hw *hw, u8 *da, u16 tid,
u16 *start_seq_num)
static int iwl4965_mac_ht_tx_agg_start(struct ieee80211_hw *hw, const u8 *da,
u16 tid, u16 *start_seq_num)
{
struct iwl4965_priv *priv = hw->priv;
int sta_id;
int tx_fifo;
int txq_id;
int ssn = -1;
int rc = 0;
unsigned long flags;
struct iwl4965_tid_data *tid_data;
DECLARE_MAC_BUF(mac);
/* Determine Tx DMA/FIFO channel for this Traffic ID */
if (likely(tid < ARRAY_SIZE(default_tid_to_tx_fifo)))
tx_fifo = default_tid_to_tx_fifo[tid];
else
return -EINVAL;
IWL_WARNING("iwl-AGG iwl4965_mac_ht_tx_agg_start on da=%s"
" tid=%d\n", print_mac(mac, da), tid);
IWL_WARNING("%s on da = %s tid = %d\n",
__func__, print_mac(mac, da), tid);
/* Get index into station table */
sta_id = iwl4965_hw_find_station(priv, da);
if (sta_id == IWL_INVALID_STATION)
return -ENXIO;
/* Find available Tx queue for aggregation */
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];
/* Get starting sequence number for 1st frame in block ack window.
* We'll use least signif byte as 1st frame's index into Tx queue. */
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;
/* Update driver's link quality manager */
iwl4965_ba_status(priv, tid, BA_STATUS_ACTIVE);
/* Set up and enable aggregation for selected Tx queue and FIFO */
return iwl4965_tx_queue_agg_enable(priv, txq_id, tx_fifo,
rc = iwl4965_tx_queue_agg_enable(priv, txq_id, tx_fifo,
sta_id, tid, ssn);
if (rc)
return rc;
rc = 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, da, 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 rc;
}
int iwl4965_mac_ht_tx_agg_stop(struct ieee80211_hw *hw, u8 *da, u16 tid)
static int iwl4965_mac_ht_tx_agg_stop(struct ieee80211_hw *hw, const u8 *da,
u16 tid)
{
struct iwl4965_priv *priv = hw->priv;
int tx_fifo_id, txq_id, sta_id, ssn = -1;
struct iwl4965_tid_data *tid_data;
int rc;
int rc, write_ptr, read_ptr;
unsigned long flags;
DECLARE_MAC_BUF(mac);
if (!da) {
IWL_ERROR("%s: da = NULL\n", __func__);
IWL_ERROR("da = NULL\n");
return -EINVAL;
}
@ -4844,36 +4885,47 @@ int iwl4965_mac_ht_tx_agg_stop(struct ieee80211_hw *hw, u8 *da, u16 tid)
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 empty\n");;
priv->stations[sta_id].tid[tid].agg.state = IWL_AGG_OFF;
spin_lock_irqsave(&priv->lock, flags);
rc = iwl4965_grab_nic_access(priv);
if (rc) {
spin_unlock_irqrestore(&priv->lock, flags);
return rc;
}
rc = iwl4965_tx_queue_agg_disable(priv, txq_id, ssn, tx_fifo_id);
/* FIXME: need more safe way to handle error condition */
iwl4965_release_nic_access(priv);
spin_unlock_irqrestore(&priv->lock, flags);
if (rc)
return rc;
iwl4965_ba_status(priv, tid, BA_STATUS_INITIATOR_DELBA);
ieee80211_stop_tx_ba_cb_irqsafe(priv->hw, da, tid);
IWL_DEBUG_INFO("iwl4965_mac_ht_tx_agg_stop on da=%s tid=%d\n",
print_mac(mac, da), tid);
print_mac(mac, da), tid);
return 0;
}
#endif /* CONFIG_IWL4965_HT_AGG */
int iwl4965_mac_ht_tx_agg_start(struct ieee80211_hw *hw, const u8 *da, u16 tid,
u16 *start_seq_num)
{
return 0;
}
int iwl4965_mac_ht_tx_agg_stop(struct ieee80211_hw *hw, const u8 *da, u16 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)
@ -4924,9 +4976,7 @@ void iwl4965_hw_rx_handler_setup(struct iwl4965_priv *priv)
iwl4965_rx_missed_beacon_notif;
#ifdef CONFIG_IWL4965_HT
#ifdef CONFIG_IWL4965_HT_AGG
priv->rx_handlers[REPLY_COMPRESSED_BA] = iwl4965_rx_reply_compressed_ba;
#endif /* CONFIG_IWL4965_HT_AGG */
#endif /* CONFIG_IWL4965_HT */
}

20
drivers/net/wireless/iwlwifi/iwl-4965.h
View File

@ -433,7 +433,6 @@ struct iwl4965_rx_queue {
#define IWL_INVALID_VALUE -1
#ifdef CONFIG_IWL4965_HT
#ifdef CONFIG_IWL4965_HT_AGG
/**
* struct iwl4965_ht_agg -- aggregation status while waiting for block-ack
* @txq_id: Tx queue used for Tx attempt
@ -453,19 +452,22 @@ struct iwl4965_ht_agg {
u16 frame_count;
u16 wait_for_ba;
u16 start_idx;
u32 bitmap0;
u32 bitmap1;
u64 bitmap;
u32 rate_n_flags;
#define IWL_AGG_OFF 0
#define IWL_AGG_ON 1
#define IWL_EMPTYING_HW_QUEUE_ADDBA 2
#define IWL_EMPTYING_HW_QUEUE_DELBA 3
u8 state;
};
#endif /* CONFIG_IWL4965_HT_AGG */
#endif /* CONFIG_IWL4965_HT */
struct iwl4965_tid_data {
u16 seq_number;
u16 tfds_in_queue;
#ifdef CONFIG_IWL4965_HT
#ifdef CONFIG_IWL4965_HT_AGG
struct iwl4965_ht_agg agg;
#endif /* CONFIG_IWL4965_HT_AGG */
#endif /* CONFIG_IWL4965_HT */
};
@ -743,7 +745,7 @@ extern u8 iwl4965_hw_find_station(struct iwl4965_priv *priv, const u8 *bssid);
extern int iwl4965_hw_channel_switch(struct iwl4965_priv *priv, u16 channel);
extern int iwl4965_tx_queue_reclaim(struct iwl4965_priv *priv, int txq_id, int index);
extern int iwl4965_queue_space(const struct iwl4965_queue *q);
struct iwl4965_priv;
/*
@ -778,6 +780,8 @@ extern void iwl4965_set_ht_add_station(struct iwl4965_priv *priv, u8 index,
extern int iwl4965_mac_ampdu_action(struct ieee80211_hw *hw,
enum ieee80211_ampdu_mlme_action action,
const u8 *addr, u16 tid, u16 *ssn);
extern int iwl4965_check_empty_hw_queue(struct iwl4965_priv *priv, int sta_id,
u8 tid, int txq_id);
#ifdef CONFIG_IWL4965_HT_AGG
extern void iwl4965_turn_off_agg(struct iwl4965_priv *priv, u8 tid);
extern void iwl4965_tl_get_stats(struct iwl4965_priv *priv,
@ -855,7 +859,7 @@ struct iwl4965_agg_control {
u32 ba_timeout;
struct iwl4965_traffic_load traffic_load[TID_MAX_LOAD_COUNT];
};
#endif /*CONFIG_IWL4965_HT_AGG */
#endif /*CONFIG_IWL4965_HT_AGG */
struct iwl4965_lq_mngr {
#ifdef CONFIG_IWL4965_HT_AGG

123
drivers/net/wireless/iwlwifi/iwl4965-base.c
View File

@ -205,7 +205,7 @@ static void iwl4965_print_hex_dump(int level, void *p, u32 len)
* See more detailed info in iwl-4965-hw.h.
***************************************************/
static int iwl4965_queue_space(const struct iwl4965_queue *q)
int iwl4965_queue_space(const struct iwl4965_queue *q)
{
int s = q->read_ptr - q->write_ptr;
@ -2972,11 +2972,10 @@ static int iwl4965_tx_skb(struct iwl4965_priv *priv,
__constant_cpu_to_le16(IEEE80211_SCTL_FRAG));
seq_number += 0x10;
#ifdef CONFIG_IWL4965_HT
#ifdef CONFIG_IWL4965_HT_AGG
/* aggregation is on for this <sta,tid> */
if (ctl->flags & IEEE80211_TXCTL_HT_MPDU_AGG)
if (ctl->flags & IEEE80211_TXCTL_AMPDU)
txq_id = priv->stations[sta_id].tid[tid].agg.txq_id;
#endif /* CONFIG_IWL4965_HT_AGG */
priv->stations[sta_id].tid[tid].tfds_in_queue++;
#endif /* CONFIG_IWL4965_HT */
}
@ -3528,10 +3527,10 @@ int iwl4965_tx_queue_reclaim(struct iwl4965_priv *priv, int txq_id, int index)
nfreed++;
}
if (iwl4965_queue_space(q) > q->low_mark && (txq_id >= 0) &&
/* if (iwl4965_queue_space(q) > q->low_mark && (txq_id >= 0) &&
(txq_id != IWL_CMD_QUEUE_NUM) &&
priv->mac80211_registered)
ieee80211_wake_queue(priv->hw, txq_id);
ieee80211_wake_queue(priv->hw, txq_id); */
return nfreed;
@ -3550,7 +3549,6 @@ static int iwl4965_is_tx_success(u32 status)
*
******************************************************************************/
#ifdef CONFIG_IWL4965_HT
#ifdef CONFIG_IWL4965_HT_AGG
static inline int iwl4965_get_ra_sta_id(struct iwl4965_priv *priv,
struct ieee80211_hdr *hdr)
@ -3585,11 +3583,11 @@ static inline u32 iwl4965_get_scd_ssn(struct iwl4965_tx_resp *tx_resp)
*/
static int iwl4965_tx_status_reply_tx(struct iwl4965_priv *priv,
struct iwl4965_ht_agg *agg,
struct iwl4965_tx_resp *tx_resp,
struct iwl4965_tx_resp_agg *tx_resp,
u16 start_idx)
{
u32 status;
__le32 *frame_status = &tx_resp->status;
u16 status;
struct agg_tx_status *frame_status = &tx_resp->status;
struct ieee80211_tx_status *tx_status = NULL;
struct ieee80211_hdr *hdr = NULL;
int i, sh;
@ -3602,26 +3600,25 @@ static int iwl4965_tx_status_reply_tx(struct iwl4965_priv *priv,
agg->frame_count = tx_resp->frame_count;
agg->start_idx = start_idx;
agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
agg->bitmap0 = agg->bitmap1 = 0;
agg->bitmap = 0;
/* # frames attempted by Tx command */
if (agg->frame_count == 1) {
/* Only one frame was attempted; no block-ack will arrive */
struct iwl4965_tx_queue *txq ;
status = le32_to_cpu(frame_status[0]);
status = le16_to_cpu(frame_status[0].status);
seq = le16_to_cpu(frame_status[0].sequence);
idx = SEQ_TO_INDEX(seq);
txq_id = SEQ_TO_QUEUE(seq);
txq_id = agg->txq_id;
txq = &priv->txq[txq_id];
/* FIXME: code repetition */
IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d \n",
agg->frame_count, agg->start_idx);
IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d idx=%d\n",
agg->frame_count, agg->start_idx, idx);
tx_status = &(priv->txq[txq_id].txb[txq->q.read_ptr].status);
tx_status = &(priv->txq[txq_id].txb[idx].status);
tx_status->retry_count = tx_resp->failure_frame;
tx_status->queue_number = status & 0xff;
tx_status->queue_length = tx_resp->bt_kill_count;
tx_status->queue_length |= tx_resp->failure_rts;
tx_status->queue_length = tx_resp->failure_rts;
tx_status->control.flags &= ~IEEE80211_TXCTL_AMPDU;
tx_status->flags = iwl4965_is_tx_success(status)?
IEEE80211_TX_STATUS_ACK : 0;
tx_status->control.tx_rate =
@ -3642,8 +3639,8 @@ static int iwl4965_tx_status_reply_tx(struct iwl4965_priv *priv,
/* Construct bit-map of pending frames within Tx window */
for (i = 0; i < agg->frame_count; i++) {
u16 sc;
status = le32_to_cpu(frame_status[i]);
seq = status >> 16;
status = le16_to_cpu(frame_status[i].status);
seq = le16_to_cpu(frame_status[i].sequence);
idx = SEQ_TO_INDEX(seq);
txq_id = SEQ_TO_QUEUE(seq);
@ -3687,13 +3684,12 @@ static int iwl4965_tx_status_reply_tx(struct iwl4965_priv *priv,
start, (u32)(bitmap & 0xFFFFFFFF));
}
agg->bitmap0 = bitmap & 0xFFFFFFFF;
agg->bitmap1 = bitmap >> 32;
agg->bitmap = bitmap;
agg->start_idx = start;
agg->rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags);
IWL_DEBUG_TX_REPLY("Frames %d start_idx=%d bitmap=0x%x\n",
IWL_DEBUG_TX_REPLY("Frames %d start_idx=%d bitmap=0x%llx\n",
agg->frame_count, agg->start_idx,
agg->bitmap0);
agg->bitmap);
if (bitmap)
agg->wait_for_ba = 1;
@ -3701,7 +3697,6 @@ static int iwl4965_tx_status_reply_tx(struct iwl4965_priv *priv,
return 0;
}
#endif
#endif
/**
* iwl4965_rx_reply_tx - Handle standard (non-aggregation) Tx response
@ -3718,9 +3713,9 @@ static void iwl4965_rx_reply_tx(struct iwl4965_priv *priv,
struct iwl4965_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
u32 status = le32_to_cpu(tx_resp->status);
#ifdef CONFIG_IWL4965_HT
#ifdef CONFIG_IWL4965_HT_AGG
int tid, sta_id;
#endif
int tid = MAX_TID_COUNT, sta_id = IWL_INVALID_STATION;
struct ieee80211_hdr *hdr;
__le16 *qc;
#endif
if ((index >= txq->q.n_bd) || (x2_queue_used(&txq->q, index) == 0)) {
@ -3732,44 +3727,51 @@ static void iwl4965_rx_reply_tx(struct iwl4965_priv *priv,
}
#ifdef CONFIG_IWL4965_HT
#ifdef CONFIG_IWL4965_HT_AGG
if (txq->sched_retry) {
const u32 scd_ssn = iwl4965_get_scd_ssn(tx_resp);
struct ieee80211_hdr *hdr =
iwl4965_tx_queue_get_hdr(priv, txq_id, index);
struct iwl4965_ht_agg *agg = NULL;
__le16 *qc = ieee80211_get_qos_ctrl(hdr);
if (qc == NULL) {
IWL_ERROR("BUG_ON qc is null!!!!\n");
return;
}
hdr = iwl4965_tx_queue_get_hdr(priv, txq_id, index);
qc = ieee80211_get_qos_ctrl(hdr);
if (qc)
tid = le16_to_cpu(*qc) & 0xf;
sta_id = iwl4965_get_ra_sta_id(priv, hdr);
if (unlikely(sta_id == IWL_INVALID_STATION)) {
IWL_ERROR("Station not known for\n");
sta_id = iwl4965_get_ra_sta_id(priv, hdr);
if (txq->sched_retry && unlikely(sta_id == IWL_INVALID_STATION)) {
IWL_ERROR("Station not known\n");
return;
}
if (txq->sched_retry) {
const u32 scd_ssn = iwl4965_get_scd_ssn(tx_resp);
struct iwl4965_ht_agg *agg = NULL;
if (!qc)
return;
}
agg = &priv->stations[sta_id].tid[tid].agg;
iwl4965_tx_status_reply_tx(priv, agg, tx_resp, index);
iwl4965_tx_status_reply_tx(priv, agg,
(struct iwl4965_tx_resp_agg *)tx_resp, index);
if ((tx_resp->frame_count == 1) &&
!iwl4965_is_tx_success(status)) {
/* TODO: send BAR */
}
if ((txq->q.read_ptr != (scd_ssn & 0xff))) {
if (txq->q.read_ptr != (scd_ssn & 0xff)) {
int freed;
index = iwl4965_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd);
IWL_DEBUG_TX_REPLY("Retry scheduler reclaim scd_ssn "
"%d index %d\n", scd_ssn , index);
iwl4965_tx_queue_reclaim(priv, txq_id, index);
freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
txq_id >= 0 && priv->mac80211_registered &&
agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)
ieee80211_wake_queue(priv->hw, txq_id);
iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
}
} else {
#endif /* CONFIG_IWL4965_HT_AGG */
#endif /* CONFIG_IWL4965_HT */
tx_status = &(txq->txb[txq->q.read_ptr].status);
@ -3790,12 +3792,21 @@ static void iwl4965_rx_reply_tx(struct iwl4965_priv *priv,
tx_resp->failure_frame);
IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
if (index != -1)
iwl4965_tx_queue_reclaim(priv, txq_id, index);
if (index != -1) {
int freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
#ifdef CONFIG_IWL4965_HT
if (tid != MAX_TID_COUNT)
priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
if (iwl4965_queue_space(&txq->q) > txq->q.low_mark &&
(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);
#endif
}
#ifdef CONFIG_IWL4965_HT
#ifdef CONFIG_IWL4965_HT_AGG
}
#endif /* CONFIG_IWL4965_HT_AGG */
#endif /* CONFIG_IWL4965_HT */
if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
@ -9089,10 +9100,8 @@ static int iwl4965_pci_probe(struct pci_dev *pdev, const struct pci_device_id *e
/* Default value; 4 EDCA QOS priorities */
hw->queues = 4;
#ifdef CONFIG_IWL4965_HT
#ifdef CONFIG_IWL4965_HT_AGG
/* Enhanced value; more queues, to support 11n aggregation */
hw->queues = 16;
#endif /* CONFIG_IWL4965_HT_AGG */
#endif /* CONFIG_IWL4965_HT */
spin_lock_init(&priv->lock);