From: Ron Rindjunsky <ron.rindjunsky@xxxxxxxxx>
This patch implements 5000 HW tx response path.
Signed-off-by: Ron Rindjunsky <ron.rindjunsky@xxxxxxxxx>
---
drivers/net/wireless/iwlwifi/iwl-5000.c | 236 +++++++++++++++++++++++++++++++
1 files changed, 236 insertions(+), 0 deletions(-)
diff --git a/drivers/net/wireless/iwlwifi/iwl-5000.c b/drivers/net/wireless/iwlwifi/iwl-5000.c
index 685a84e..cfabcb0 100644
--- a/drivers/net/wireless/iwlwifi/iwl-5000.c
+++ b/drivers/net/wireless/iwlwifi/iwl-5000.c
@@ -972,6 +972,241 @@ static void iwl5000_txq_set_sched(struct iwl_priv *priv, u32 mask)
iwl_write_prph(priv, IWL50_SCD_TXFACT, mask);
}
+
+static inline u32 iwl5000_get_scd_ssn(struct iwl5000_tx_resp *tx_resp)
+{
+ __le32 *scd_ssn = (__le32 *)((u32 *)&tx_resp->status +
+ tx_resp->frame_count);
+ return le32_to_cpu(*scd_ssn) & MAX_SN;
+
+}
+
+static int iwl5000_tx_status_reply_tx(struct iwl_priv *priv,
+ struct iwl_ht_agg *agg,
+ struct iwl5000_tx_resp *tx_resp,
+ u16 start_idx)
+{
+ u16 status;
+ struct agg_tx_status *frame_status = &tx_resp->status;
+ struct ieee80211_tx_info *info = NULL;
+ struct ieee80211_hdr *hdr = NULL;
+ int i, sh;
+ int txq_id, idx;
+ u16 seq;
+
+ if (agg->wait_for_ba)
+ IWL_DEBUG_TX_REPLY("got tx response w/o block-ack\n");
+
+ 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->bitmap = 0;
+
+ /* # frames attempted by Tx command */
+ if (agg->frame_count == 1) {
+ /* Only one frame was attempted; no block-ack will arrive */
+ 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);
+
+ /* FIXME: code repetition */
+ IWL_DEBUG_TX_REPLY("FrameCnt = %d, StartIdx=%d idx=%d\n",
+ agg->frame_count, agg->start_idx, idx);
+
+ info = IEEE80211_SKB_CB(priv->txq[txq_id].txb[idx].skb[0]);
+ info->status.retry_count = tx_resp->failure_frame;
+ info->flags &= ~IEEE80211_TX_CTL_AMPDU;
+ info->flags |= iwl_is_tx_success(status)?
+ IEEE80211_TX_STAT_ACK : 0;
+ iwl4965_hwrate_to_tx_control(priv,
+ le32_to_cpu(tx_resp->rate_n_flags),
+ info);
+ /* FIXME: code repetition end */
+
+ IWL_DEBUG_TX_REPLY("1 Frame 0x%x failure :%d\n",
+ status & 0xff, tx_resp->failure_frame);
+ IWL_DEBUG_TX_REPLY("Rate Info rate_n_flags=%x\n",
+ iwl4965_hw_get_rate_n_flags(tx_resp->rate_n_flags));
+
+ agg->wait_for_ba = 0;
+ } else {
+ /* Two or more frames were attempted; expect block-ack */
+ u64 bitmap = 0;
+ int start = agg->start_idx;
+
+ /* Construct bit-map of pending frames within Tx window */
+ for (i = 0; i < agg->frame_count; i++) {
+ u16 sc;
+ 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);
+
+ if (status & (AGG_TX_STATE_FEW_BYTES_MSK |
+ AGG_TX_STATE_ABORT_MSK))
+ continue;
+
+ IWL_DEBUG_TX_REPLY("FrameCnt = %d, txq_id=%d idx=%d\n",
+ agg->frame_count, txq_id, idx);
+
+ hdr = iwl_tx_queue_get_hdr(priv, txq_id, idx);
+
+ sc = le16_to_cpu(hdr->seq_ctrl);
+ if (idx != (SEQ_TO_SN(sc) & 0xff)) {
+ IWL_ERROR("BUG_ON idx doesn't match seq control"
+ " idx=%d, seq_idx=%d, seq=%d\n",
+ idx, SEQ_TO_SN(sc),
+ hdr->seq_ctrl);
+ return -1;
+ }
+
+ IWL_DEBUG_TX_REPLY("AGG Frame i=%d idx %d seq=%d\n",
+ i, idx, SEQ_TO_SN(sc));
+
+ sh = idx - start;
+ if (sh > 64) {
+ sh = (start - idx) + 0xff;
+ bitmap = bitmap << sh;
+ sh = 0;
+ start = idx;
+ } else if (sh < -64)
+ sh = 0xff - (start - idx);
+ else if (sh < 0) {
+ sh = start - idx;
+ start = idx;
+ bitmap = bitmap << sh;
+ sh = 0;
+ }
+ bitmap |= (1 << sh);
+ IWL_DEBUG_TX_REPLY("start=%d bitmap=0x%x\n",
+ start, (u32)(bitmap & 0xFFFFFFFF));
+ }
+
+ 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%llx\n",
+ agg->frame_count, agg->start_idx,
+ (unsigned long long)agg->bitmap);
+
+ if (bitmap)
+ agg->wait_for_ba = 1;
+ }
+ return 0;
+}
+
+static void iwl5000_rx_reply_tx(struct iwl_priv *priv,
+ struct iwl_rx_mem_buffer *rxb)
+{
+ struct iwl_rx_packet *pkt = (struct iwl_rx_packet *)rxb->skb->data;
+ u16 sequence = le16_to_cpu(pkt->hdr.sequence);
+ int txq_id = SEQ_TO_QUEUE(sequence);
+ int index = SEQ_TO_INDEX(sequence);
+ struct iwl_tx_queue *txq = &priv->txq[txq_id];
+ struct ieee80211_tx_info *info;
+ struct iwl5000_tx_resp *tx_resp = (void *)&pkt->u.raw[0];
+ u32 status = le16_to_cpu(tx_resp->status.status);
+#ifdef CONFIG_IWL4965_HT
+ int tid = MAX_TID_COUNT, sta_id = IWL_INVALID_STATION;
+ u16 fc;
+ struct ieee80211_hdr *hdr;
+ u8 *qc = NULL;
+#endif
+
+ if ((index >= txq->q.n_bd) || (iwl_queue_used(&txq->q, index) == 0)) {
+ IWL_ERROR("Read index for DMA queue txq_id (%d) index %d "
+ "is out of range [0-%d] %d %d\n", txq_id,
+ index, txq->q.n_bd, txq->q.write_ptr,
+ txq->q.read_ptr);
+ return;
+ }
+
+ info = IEEE80211_SKB_CB(txq->txb[txq->q.read_ptr].skb[0]);
+ memset(&info->status, 0, sizeof(info->status));
+
+#ifdef CONFIG_IWL4965_HT
+ hdr = iwl_tx_queue_get_hdr(priv, txq_id, index);
+ fc = le16_to_cpu(hdr->frame_control);
+ if (ieee80211_is_qos_data(fc)) {
+ qc = ieee80211_get_qos_ctrl(hdr, ieee80211_get_hdrlen(fc));
+ tid = qc[0] & 0xf;
+ }
+
+ sta_id = iwl_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 = iwl5000_get_scd_ssn(tx_resp);
+ struct iwl_ht_agg *agg = NULL;
+
+ if (!qc)
+ return;
+
+ agg = &priv->stations[sta_id].tid[tid].agg;
+
+ iwl5000_tx_status_reply_tx(priv, agg, tx_resp, index);
+
+ if ((tx_resp->frame_count == 1) && !iwl_is_tx_success(status)) {
+ /* TODO: send BAR */
+ }
+
+ if (txq->q.read_ptr != (scd_ssn & 0xff)) {
+ int freed, ampdu_q;
+ index = iwl_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);
+ freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
+ priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
+
+ if (iwl_queue_space(&txq->q) > txq->q.low_mark &&
+ txq_id >= 0 && priv->mac80211_registered &&
+ agg->state != IWL_EMPTYING_HW_QUEUE_DELBA) {
+ /* calculate mac80211 ampdu sw queue to wake */
+ ampdu_q = txq_id - IWL_BACK_QUEUE_FIRST_ID +
+ priv->hw->queues;
+ if (agg->state == IWL_AGG_OFF)
+ ieee80211_wake_queue(priv->hw, txq_id);
+ else
+ ieee80211_wake_queue(priv->hw, ampdu_q);
+ }
+ iwl4965_check_empty_hw_queue(priv, sta_id, tid, txq_id);
+ }
+ } else {
+#endif /* CONFIG_IWL4965_HT */
+
+ info->status.retry_count = tx_resp->failure_frame;
+ info->flags = iwl_is_tx_success(status) ? IEEE80211_TX_STAT_ACK : 0;
+ iwl4965_hwrate_to_tx_control(priv, le32_to_cpu(tx_resp->rate_n_flags),
+ info);
+
+ IWL_DEBUG_TX("Tx queue %d Status %s (0x%08x) rate_n_flags 0x%x "
+ "retries %d\n", txq_id, iwl_get_tx_fail_reason(status),
+ status, le32_to_cpu(tx_resp->rate_n_flags),
+ tx_resp->failure_frame);
+
+ IWL_DEBUG_TX_REPLY("Tx queue reclaim %d\n", index);
+#ifdef CONFIG_IWL4965_HT
+ if (index != -1) {
+ int freed = iwl4965_tx_queue_reclaim(priv, txq_id, index);
+ if (tid != MAX_TID_COUNT)
+ priv->stations[sta_id].tid[tid].tfds_in_queue -= freed;
+ if (iwl_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 /* CONFIG_IWL4965_HT */
+
+ if (iwl_check_bits(status, TX_ABORT_REQUIRED_MSK))
+ IWL_ERROR("TODO: Implement Tx ABORT REQUIRED!!!\n");
+}
+
/* Currently 5000 is the supperset of everything */
static u16 iwl5000_get_hcmd_size(u8 cmd_id, u16 len)
{
@@ -985,6 +1220,7 @@ static void iwl5000_rx_handler_setup(struct iwl_priv *priv)
iwl5000_rx_calib_result;
priv->rx_handlers[CALIBRATION_COMPLETE_NOTIFICATION] =
iwl5000_rx_calib_complete;
+ priv->rx_handlers[REPLY_TX] = iwl5000_rx_reply_tx;
}
--
1.5.3.6
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