int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
struct ieee80211_sta *sta, u16 tid, u16 *ssn)
{
struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv;
int sta_id;
int ret;
IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n",
sta->addr, tid);
sta_id = iwl_sta_id(sta);
if (sta_id == IWL_INVALID_STATION) {
IWL_ERR(priv, "Start AGG on invalid station\n");
return -ENXIO;
}
if (unlikely(tid >= IWL_MAX_TID_COUNT))
return -EINVAL;
if (priv->shrd->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) {
IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n");
return -ENXIO;
}
ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
if (ret)
return ret;
ret = iwl_trans_tx_agg_alloc(trans(priv), vif_priv->ctx->ctxid, sta_id,
tid, ssn);
return ret;
}
static int iwl5000_txq_agg_enable(struct iwl_priv *priv, int txq_id,
int tx_fifo, int sta_id, int tid, u16 ssn_idx)
{
unsigned long flags;
u16 ra_tid;
if ((IWL50_FIRST_AMPDU_QUEUE > txq_id) ||
(IWL50_FIRST_AMPDU_QUEUE + IWL50_NUM_AMPDU_QUEUES <= txq_id)) {
IWL_WARN(priv,
"queue number out of range: %d, must be %d to %d\n",
txq_id, IWL50_FIRST_AMPDU_QUEUE,
IWL50_FIRST_AMPDU_QUEUE + IWL50_NUM_AMPDU_QUEUES - 1);
return -EINVAL;
}
ra_tid = BUILD_RAxTID(sta_id, tid);
/* Modify device's station table to Tx this TID */
iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
spin_lock_irqsave(&priv->lock, flags);
/* Stop this Tx queue before configuring it */
iwl5000_tx_queue_stop_scheduler(priv, txq_id);
/* Map receiver-address / traffic-ID to this queue */
iwl5000_tx_queue_set_q2ratid(priv, ra_tid, txq_id);
/* Set this queue as a chain-building queue */
iwl_set_bits_prph(priv, IWL50_SCD_QUEUECHAIN_SEL, (1<<txq_id));
/* enable aggregations for the queue */
iwl_set_bits_prph(priv, IWL50_SCD_AGGR_SEL, (1<<txq_id));
/* Place first TFD at index corresponding to start sequence number.
* Assumes that ssn_idx is valid (!= 0xFFF) */
priv->txq[txq_id].q.read_ptr = (ssn_idx & 0xff);
priv->txq[txq_id].q.write_ptr = (ssn_idx & 0xff);
iwl5000_set_wr_ptrs(priv, txq_id, ssn_idx);
/* Set up Tx window size and frame limit for this queue */
iwl_write_targ_mem(priv, priv->scd_base_addr +
IWL50_SCD_CONTEXT_QUEUE_OFFSET(txq_id) +
sizeof(u32),
((SCD_WIN_SIZE <<
IWL50_SCD_QUEUE_CTX_REG2_WIN_SIZE_POS) &
IWL50_SCD_QUEUE_CTX_REG2_WIN_SIZE_MSK) |
((SCD_FRAME_LIMIT <<
IWL50_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_POS) &
IWL50_SCD_QUEUE_CTX_REG2_FRAME_LIMIT_MSK));
iwl_set_bits_prph(priv, IWL50_SCD_INTERRUPT_MASK, (1 << txq_id));
/* Set up Status area in SRAM, map to Tx DMA/FIFO, activate the queue */
iwl5000_tx_queue_set_status(priv, &priv->txq[txq_id], tx_fifo, 1);
spin_unlock_irqrestore(&priv->lock, flags);
return 0;
}
int iwlagn_tx_agg_start(struct iwl_priv *priv, struct ieee80211_vif *vif,
struct ieee80211_sta *sta, u16 tid, u16 *ssn)
{
struct iwl_tid_data *tid_data;
unsigned long flags;
int sta_id;
int ret;
IWL_DEBUG_HT(priv, "TX AGG request on ra = %pM tid = %d\n",
sta->addr, tid);
sta_id = iwl_sta_id(sta);
if (sta_id == IWL_INVALID_STATION) {
IWL_ERR(priv, "Start AGG on invalid station\n");
return -ENXIO;
}
if (unlikely(tid >= IWL_MAX_TID_COUNT))
return -EINVAL;
if (priv->tid_data[sta_id][tid].agg.state != IWL_AGG_OFF) {
IWL_ERR(priv, "Start AGG when state is not IWL_AGG_OFF !\n");
return -ENXIO;
}
ret = iwl_sta_tx_modify_enable_tid(priv, sta_id, tid);
if (ret)
return ret;
spin_lock_irqsave(&priv->shrd->sta_lock, flags);
tid_data = &priv->tid_data[sta_id][tid];
tid_data->agg.ssn = SEQ_TO_SN(tid_data->seq_number);
*ssn = tid_data->agg.ssn;
ret = iwl_trans_tx_agg_alloc(trans(priv), sta_id, tid);
if (ret) {
spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
return ret;
}
if (*ssn == tid_data->next_reclaimed) {
IWL_DEBUG_TX_QUEUES(priv, "Can proceed: ssn = next_recl = %d",
tid_data->agg.ssn);
tid_data->agg.state = IWL_AGG_ON;
ieee80211_start_tx_ba_cb_irqsafe(vif, sta->addr, tid);
} else {
IWL_DEBUG_TX_QUEUES(priv, "Can't proceed: ssn %d, "
"next_reclaimed = %d",
tid_data->agg.ssn,
tid_data->next_reclaimed);
tid_data->agg.state = IWL_EMPTYING_HW_QUEUE_ADDBA;
}
spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
return ret;
}
