iwlwlifi: impelemnt 5000 tx response path (e532fa0e) · Commits · e / devices / android_kernel_oneplus_sm7250

drivers/net/wireless/iwlwifi/iwl-5000.c

+236 −0

Original line number	Diff line number	Diff line
		@@ -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;
		}