From 4c39342f6a2475b8dbd97739004e9f241f7ad448 Mon Sep 17 00:00:00 2001
From: Varsha Mishra <varsham@codeaurora.org>
Date: Thu, 9 Apr 2020 22:41:40 +0530
Subject: [PATCH] qcacmn: Lockless access of reo destination rings

Remove lock to access REO destination rings because 4 rings are
accessed in 4 individual cores.

Change-Id: Ia3f92cc5136dbdbeea1e9cda8d52b474356a3e1a
CRs-Fixed: 2660901
---
 dp/wifi3.0/dp_rx.c |  4 ++--
 dp/wifi3.0/dp_rx.h | 47 ++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 49 insertions(+), 2 deletions(-)

diff --git a/dp/wifi3.0/dp_rx.c b/dp/wifi3.0/dp_rx.c
index 4055b008fc..fe6402ba7c 100644
--- a/dp/wifi3.0/dp_rx.c
+++ b/dp/wifi3.0/dp_rx.c
@@ -1886,7 +1886,7 @@ more_data:
 	qdf_mem_zero(head, sizeof(head));
 	qdf_mem_zero(tail, sizeof(tail));
 
-	if (qdf_unlikely(dp_srng_access_start(int_ctx, soc, hal_ring_hdl))) {
+	if (qdf_unlikely(dp_rx_srng_access_start(int_ctx, soc, hal_ring_hdl))) {
 
 		/*
 		 * Need API to convert from hal_ring pointer to
@@ -2081,7 +2081,7 @@ more_data:
 			break;
 	}
 done:
-	dp_srng_access_end(int_ctx, soc, hal_ring_hdl);
+	dp_rx_srng_access_end(int_ctx, soc, hal_ring_hdl);
 
 	for (mac_id = 0; mac_id < MAX_PDEV_CNT; mac_id++) {
 		/*
diff --git a/dp/wifi3.0/dp_rx.h b/dp/wifi3.0/dp_rx.h
index fb2d94c474..c07d841f66 100644
--- a/dp/wifi3.0/dp_rx.h
+++ b/dp/wifi3.0/dp_rx.h
@@ -1192,4 +1192,51 @@ void dp_rx_deliver_to_stack(struct dp_soc *soc,
 			    qdf_nbuf_t nbuf_head,
 			    qdf_nbuf_t nbuf_tail);
 
+#ifdef QCA_OL_RX_LOCK_LESS_ACCESS
+/*
+ * dp_rx_ring_access_start()- Wrapper function to log access start of a hal ring
+ * @int_ctx: pointer to DP interrupt context
+ * @dp_soc - DP soc structure pointer
+ * @hal_ring_hdl - HAL ring handle
+ *
+ * Return: 0 on success; error on failure
+ */
+static inline int
+dp_rx_srng_access_start(struct dp_intr *int_ctx, struct dp_soc *soc,
+			hal_ring_handle_t hal_ring_hdl)
+{
+	return hal_srng_access_start_unlocked(soc->hal_soc, hal_ring_hdl);
+}
+
+/*
+ * dp_rx_ring_access_end()- Wrapper function to log access end of a hal ring
+ * @int_ctx: pointer to DP interrupt context
+ * @dp_soc - DP soc structure pointer
+ * @hal_ring_hdl - HAL ring handle
+ *
+ * Return - None
+ */
+static inline void
+dp_rx_srng_access_end(struct dp_intr *int_ctx, struct dp_soc *soc,
+		      hal_ring_handle_t hal_ring_hdl)
+{
+	hal_srng_access_end_unlocked(soc->hal_soc, hal_ring_hdl);
+}
+#else
+static inline int
+dp_rx_srng_access_start(struct dp_intr *int_ctx, struct dp_soc *soc,
+			hal_ring_handle_t hal_ring_hdl)
+{
+	return dp_srng_access_start(int_ctx, soc, hal_ring_hdl);
+}
+
+static inline void
+dp_rx_srng_access_end(struct dp_intr *int_ctx, struct dp_soc *soc,
+		      hal_ring_handle_t hal_ring_hdl)
+{
+	dp_srng_access_end(int_ctx, soc, hal_ring_hdl);
+}
+
+#endif
+
 #endif /* _DP_RX_H */