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 <tomas.winkler@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-tx.c b/drivers/net/wireless/iwlwifi/iwl-tx.c
index 224bcec..cfe6f4b 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 @@
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