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| author | Emmanuel Grumbach <emmanuel.grumbach@intel.com> | 2011-08-26 08:11:00 +0200 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2011-08-29 21:25:34 +0200 |
| commit | a0eaad713f6fc1f63fe293ad6ce63cb01e05c03c (patch) | |
| tree | 72dee57cdee0bfb9e796d6b12159b75eae17f5c7 /drivers/net/wireless/iwlwifi/iwl-trans.c | |
| parent | iwlagn: move isr_statistics to transport layer (diff) | |
| download | linux-a0eaad713f6fc1f63fe293ad6ce63cb01e05c03c.tar.xz linux-a0eaad713f6fc1f63fe293ad6ce63cb01e05c03c.zip | |
iwlagn: reclaim the packets in transport layer
The reclaim flow is really transport related. Define a simple API to allow the
upper layer to request from the transport layer to reclaim packets until an
index written in the Tx response / BA notification.
The transport layer prepares a list of the packets that are being freed and
passes this list to the upper layer.
Between the two layers, the CB of the skb is used to pass a pointer to the
context (BSS / PAN) in which the skb was sent.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/iwlwifi/iwl-trans.c')
| -rw-r--r-- | drivers/net/wireless/iwlwifi/iwl-trans.c | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/drivers/net/wireless/iwlwifi/iwl-trans.c b/drivers/net/wireless/iwlwifi/iwl-trans.c index 63a310135f76..06cec8268c6c 100644 --- a/drivers/net/wireless/iwlwifi/iwl-trans.c +++ b/drivers/net/wireless/iwlwifi/iwl-trans.c @@ -1106,7 +1106,7 @@ static int iwl_trans_pcie_tx(struct iwl_priv *priv, struct sk_buff *skb, * regardless of the value of ret. "ret" only indicates * whether or not we should update the write pointer. */ - if ((iwl_queue_space(q) < q->high_mark) && priv->mac80211_registered) { + if (iwl_queue_space(q) < q->high_mark) { if (wait_write_ptr) { txq->need_update = 1; iwl_txq_update_write_ptr(priv, txq); @@ -1148,6 +1148,34 @@ static int iwl_trans_pcie_request_irq(struct iwl_trans *trans) return 0; } +static void iwl_trans_pcie_reclaim(struct iwl_trans *trans, int txq_id, + int ssn, u32 status, struct sk_buff_head *skbs) +{ + struct iwl_priv *priv = priv(trans); + struct iwl_tx_queue *txq = &priv->txq[txq_id]; + /* n_bd is usually 256 => n_bd - 1 = 0xff */ + int tfd_num = ssn & (txq->q.n_bd - 1); + u8 agg_state; + bool cond; + + if (txq->sched_retry) { + agg_state = + priv->stations[txq->sta_id].tid[txq->tid].agg.state; + cond = (agg_state != IWL_EMPTYING_HW_QUEUE_DELBA); + } else { + cond = (status != TX_STATUS_FAIL_PASSIVE_NO_RX); + } + + if (txq->q.read_ptr != tfd_num) { + IWL_DEBUG_TX_REPLY(trans, "Retry scheduler reclaim " + "scd_ssn=%d idx=%d txq=%d swq=%d\n", + ssn , tfd_num, txq_id, txq->swq_id); + iwl_tx_queue_reclaim(trans, txq_id, tfd_num, skbs); + if (iwl_queue_space(&txq->q) > txq->q.low_mark && cond) + iwl_wake_queue(priv, txq); + } +} + static void iwl_trans_pcie_disable_sync_irq(struct iwl_trans *trans) { unsigned long flags; @@ -1626,6 +1654,7 @@ const struct iwl_trans_ops trans_ops_pcie = { .get_tx_cmd = iwl_trans_pcie_get_tx_cmd, .tx = iwl_trans_pcie_tx, + .reclaim = iwl_trans_pcie_reclaim, .txq_agg_disable = iwl_trans_pcie_txq_agg_disable, .txq_agg_setup = iwl_trans_pcie_txq_agg_setup, |