qcacmn: Update TX HP only for last TSO segment

Currently HW TX queue HP value is updated for every TSO segment enqueue,
as a part of optimization update HP only for the last segment.

Change-Id: Ibe349a1e6f55932bf780e1f755f13841078a493f
CRs-Fixed: 3138142

dp/wifi3.0/be/dp_be_tx.c

@@ -652,7 +652,7 @@ dp_tx_hw_enqueue_be(struct dp_soc *soc, struct dp_vdev *vdev,
 	/* Sync cached descriptor with HW */
 	hal_tx_desc_sync(hal_tx_desc_cached, hal_tx_desc);
 
-	coalesce = dp_tx_attempt_coalescing(soc, vdev, tx_desc, tid);
+	coalesce = dp_tx_attempt_coalescing(soc, vdev, tx_desc, tid, msdu_info);
 
 	DP_STATS_INC_PKT(vdev, tx_i.processed, 1, tx_desc->length);
 	DP_STATS_INC(soc, tx.tcl_enq[ring_id], 1);

dp/wifi3.0/dp_tx.c

@@ -1439,7 +1439,8 @@ void dp_tx_update_stats(struct dp_soc *soc,
 int
 dp_tx_attempt_coalescing(struct dp_soc *soc, struct dp_vdev *vdev,
 			 struct dp_tx_desc_s *tx_desc,
-			 uint8_t tid)
+			 uint8_t tid,
+			 struct dp_tx_msdu_info_s *msdu_info)
 {
 	struct dp_swlm *swlm = &soc->swlm;
 	union swlm_data swlm_query_data;
@@ -1447,8 +1448,8 @@ dp_tx_attempt_coalescing(struct dp_soc *soc, struct dp_vdev *vdev,
 	QDF_STATUS status;
 	int ret;
 
-	if (qdf_unlikely(!swlm->is_enabled))
+	if (!swlm->is_enabled)
-		return 0;
+		return msdu_info->skip_hp_update;
 
 	tcl_data.nbuf = tx_desc->nbuf;
 	tcl_data.tid = tid;
@@ -1482,6 +1483,51 @@ dp_tx_ring_access_end(struct dp_soc *soc, hal_ring_handle_t hal_ring_hdl,
 		dp_tx_hal_ring_access_end(soc, hal_ring_hdl);
 }
 
+static inline void
+dp_tx_is_hp_update_required(uint32_t i, struct dp_tx_msdu_info_s *msdu_info)
+{
+	if (((i + 1) < msdu_info->num_seg))
+		msdu_info->skip_hp_update = 1;
+	else
+		msdu_info->skip_hp_update = 0;
+}
+
+static inline void
+dp_flush_tcp_hp(struct dp_soc *soc, uint8_t ring_id)
+{
+	hal_ring_handle_t hal_ring_hdl =
+		dp_tx_get_hal_ring_hdl(soc, ring_id);
+
+	if (dp_tx_hal_ring_access_start(soc, hal_ring_hdl)) {
+		dp_err("Fillmore: SRNG access start failed");
+		return;
+	}
+
+	dp_tx_ring_access_end_wrapper(soc, hal_ring_hdl, 0);
+}
+
+static inline void
+dp_tx_check_and_flush_hp(struct dp_soc *soc,
+			 QDF_STATUS status,
+			 struct dp_tx_msdu_info_s *msdu_info)
+{
+	if (QDF_IS_STATUS_ERROR(status) && !msdu_info->skip_hp_update) {
+		dp_flush_tcp_hp(soc,
+			(msdu_info->tx_queue.ring_id & DP_TX_QUEUE_MASK));
+	}
+}
+#else
+static inline void
+dp_tx_is_hp_update_required(uint32_t i, struct dp_tx_msdu_info_s *msdu_info)
+{
+}
+
+static inline void
+dp_tx_check_and_flush_hp(struct dp_soc *soc,
+			 QDF_STATUS status,
+			 struct dp_tx_msdu_info_s *msdu_info)
+{
+}
 #endif
 
 #ifdef FEATURE_RUNTIME_PM
@@ -2379,6 +2425,8 @@ qdf_nbuf_t dp_tx_send_msdu_multiple(struct dp_vdev *vdev, qdf_nbuf_t nbuf,
 			DP_TX_TCL_METADATA_VALID_HTT_SET(htt_tcl_metadata, 1);
 		}
 
+		dp_tx_is_hp_update_required(i, msdu_info);
+
 		/*
 		 * For frames with multiple segments (TSO, ME), jump to next
 		 * segment.
@@ -2414,6 +2462,8 @@ qdf_nbuf_t dp_tx_send_msdu_multiple(struct dp_vdev *vdev, qdf_nbuf_t nbuf,
 						     htt_tcl_metadata,
 						     NULL, msdu_info);
 
+		dp_tx_check_and_flush_hp(soc, status, msdu_info);
+
 		if (status != QDF_STATUS_SUCCESS) {
 			dp_info_rl("Tx_hw_enqueue Fail tx_desc %pK queue %d",
 				   tx_desc, tx_q->ring_id);

dp/wifi3.0/dp_tx.h

@@ -188,6 +188,7 @@ struct dp_tx_queue {
  * @ix_tx_sniffer: Indicates if the packet has to be sniffed
  * @gsn: global sequence for reinjected mcast packets
  * @vdev_id : vdev_id for reinjected mcast packets
+ * @skip_hp_update : Skip HP update for TSO segments and update in last segment
  *
  * This structure holds the complete MSDU information needed to program the
  * Hardware TCL and MSDU extension descriptors for different frame types
@@ -212,6 +213,9 @@ struct dp_tx_msdu_info_s {
 	uint8_t vdev_id;
 #endif
 #endif
+#ifdef WLAN_DP_FEATURE_SW_LATENCY_MGR
+	uint8_t skip_hp_update;
+#endif
 };
 
 #ifndef QCA_HOST_MODE_WIFI_DISABLED
@@ -786,6 +790,7 @@ void dp_tx_update_stats(struct dp_soc *soc,
  * @soc: Datapath soc handle
  * @tx_desc: tx packet descriptor
  * @tid: TID for pkt transmission
+ * @msdu_info: MSDU info of tx packet
  *
  * Returns: 1, if coalescing is to be done
  *	    0, if coalescing is not to be done
@@ -793,7 +798,7 @@ void dp_tx_update_stats(struct dp_soc *soc,
 int
 dp_tx_attempt_coalescing(struct dp_soc *soc, struct dp_vdev *vdev,
 			 struct dp_tx_desc_s *tx_desc,
-			 uint8_t tid);
+			 uint8_t tid, struct dp_tx_msdu_info_s *msdu_info);
 
 /**
  * dp_tx_ring_access_end() - HAL ring access end for data transmission
@@ -826,7 +831,8 @@ dp_tx_ring_access_end(struct dp_soc *soc, hal_ring_handle_t hal_ring_hdl,
 static inline int
 dp_tx_attempt_coalescing(struct dp_soc *soc, struct dp_vdev *vdev,
 			 struct dp_tx_desc_s *tx_desc,
-			 uint8_t tid)
+			 uint8_t tid,
+			 struct dp_tx_msdu_info_s *msdu_info)
 {
 	return 0;
 }

dp/wifi3.0/li/dp_li_tx.c

@@ -502,7 +502,7 @@ dp_tx_hw_enqueue_li(struct dp_soc *soc, struct dp_vdev *vdev,
 	tx_desc->flags |= DP_TX_DESC_FLAG_QUEUED_TX;
 	dp_vdev_peer_stats_update_protocol_cnt_tx(vdev, tx_desc->nbuf);
 	hal_tx_desc_sync(hal_tx_desc_cached, hal_tx_desc);
-	coalesce = dp_tx_attempt_coalescing(soc, vdev, tx_desc, tid);
+	coalesce = dp_tx_attempt_coalescing(soc, vdev, tx_desc, tid, msdu_info);
 	DP_STATS_INC_PKT(vdev, tx_i.processed, 1, tx_desc->length);
 	DP_STATS_INC(soc, tx.tcl_enq[ring_id], 1);
 	dp_tx_update_stats(soc, tx_desc->nbuf);