From c4ae3d34b69b0b97c79a6060f17dd199cb85ea12 Mon Sep 17 00:00:00 2001
From: Radha Krishna Simha Jiguru <rjiguru@codeaurora.org>
Date: Mon, 23 Mar 2020 10:08:25 +0530
Subject: [PATCH] qcacmn: Add support for lock less access of Tx rings

For 4 core CPU system, Tx access can be made lockless by associating
one Tx ring per CPU. Three Tx DATA rings and one SW2TX command ring
can be used for sending data to Tx.

Change-Id: I6e38cad52dffa4e46ff2b736cd6b949d061fa2a4
---
 dp/wifi3.0/dp_tx.c |  6 ++---
 dp/wifi3.0/dp_tx.h | 62 ++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 65 insertions(+), 3 deletions(-)

diff --git a/dp/wifi3.0/dp_tx.c b/dp/wifi3.0/dp_tx.c
index 5c65ee6c96..7420e8c2cb 100644
--- a/dp/wifi3.0/dp_tx.c
+++ b/dp/wifi3.0/dp_tx.c
@@ -1205,7 +1205,7 @@ static QDF_STATUS dp_tx_hw_enqueue(struct dp_soc *soc, struct dp_vdev *vdev,
 
 	hal_ring_hdl = dp_tx_get_hal_ring_hdl(soc, ring_id);
 
-	if (qdf_unlikely(hal_srng_access_start(soc->hal_soc, hal_ring_hdl))) {
+	if (qdf_unlikely(dp_tx_hal_ring_access_start(soc, hal_ring_hdl))) {
 		QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_ERROR,
 			  "%s %d : HAL RING Access Failed -- %pK",
 			 __func__, __LINE__, hal_ring_hdl);
@@ -1233,11 +1233,11 @@ static QDF_STATUS dp_tx_hw_enqueue(struct dp_soc *soc, struct dp_vdev *vdev,
 ring_access_fail:
 	if (hif_pm_runtime_get(soc->hif_handle,
 			       RTPM_ID_DW_TX_HW_ENQUEUE) == 0) {
-		hal_srng_access_end(soc->hal_soc, hal_ring_hdl);
+		dp_tx_hal_ring_access_end(soc, hal_ring_hdl);
 		hif_pm_runtime_put(soc->hif_handle,
 				   RTPM_ID_DW_TX_HW_ENQUEUE);
 	} else {
-		hal_srng_access_end_reap(soc->hal_soc, hal_ring_hdl);
+		dp_tx_hal_ring_access_end_reap(soc, hal_ring_hdl);
 	}
 
 	return status;
diff --git a/dp/wifi3.0/dp_tx.h b/dp/wifi3.0/dp_tx.h
index 8d769f01f7..1850ec624b 100644
--- a/dp/wifi3.0/dp_tx.h
+++ b/dp/wifi3.0/dp_tx.h
@@ -378,6 +378,68 @@ static inline uint8_t dp_tx_get_rbm_id(struct dp_soc *soc,
 	return (ring_id + HAL_WBM_SW0_BM_ID);
 }
 #endif
+
+#ifdef QCA_OL_TX_LOCK_LESS_ACCESS
+/*
+ * dp_tx_hal_ring_access_start()- hal_tx_ring access for data transmission
+ * @dp_soc - DP soc structure pointer
+ * @hal_ring_hdl - HAL ring handle
+ *
+ * Return - None
+ */
+static inline int dp_tx_hal_ring_access_start(struct dp_soc *soc,
+					      hal_ring_handle_t hal_ring_hdl)
+{
+	return hal_srng_access_start_unlocked(soc->hal_soc, hal_ring_hdl);
+}
+
+/*
+ * dp_tx_hal_ring_access_end()- hal_tx_ring access for data transmission
+ * @dp_soc - DP soc structure pointer
+ * @hal_ring_hdl - HAL ring handle
+ *
+ * Return - None
+ */
+static inline void dp_tx_hal_ring_access_end(struct dp_soc *soc,
+					     hal_ring_handle_t hal_ring_hdl)
+{
+	hal_srng_access_end_unlocked(soc->hal_soc, hal_ring_hdl);
+}
+
+/*
+ * dp_tx_hal_ring_access_reap()- hal_tx_ring access for data transmission
+ * @dp_soc - DP soc structure pointer
+ * @hal_ring_hdl - HAL ring handle
+ *
+ * Return - None
+ */
+static inline void dp_tx_hal_ring_access_end_reap(struct dp_soc *soc,
+						  hal_ring_handle_t
+						  hal_ring_hdl)
+{
+}
+
+#else
+static inline int dp_tx_hal_ring_access_start(struct dp_soc *soc,
+					      hal_ring_handle_t hal_ring_hdl)
+{
+	return hal_srng_access_start(soc->hal_soc, hal_ring_hdl);
+}
+
+static inline void dp_tx_hal_ring_access_end(struct dp_soc *soc,
+					     hal_ring_handle_t hal_ring_hdl)
+{
+	hal_srng_access_end(soc->hal_soc, hal_ring_hdl);
+}
+
+static inline void dp_tx_hal_ring_access_end_reap(struct dp_soc *soc,
+						  hal_ring_handle_t
+						  hal_ring_hdl)
+{
+	hal_srng_access_end_reap(soc->hal_soc, hal_ring_hdl);
+}
+#endif
+
 #ifdef FEATURE_PERPKT_INFO
 QDF_STATUS
 dp_get_completion_indication_for_stack(struct dp_soc *soc,