qcacmn: Add history to track the entries in rx rings

The rx rings are relatively of smaller size. Any
duplicate entry sent by hardware cannot be back-tracked
by just looking at the ring contents alone.

Hence add a history to track the entries for the
REO2SW, REO exception and SW2REO ring.

Change-Id: I9b0b311950d60a9421378ce0fcc0535be450f713
CRs-Fixed: 2739181

dp/wifi3.0/dp_rx.c

@@ -1948,6 +1948,49 @@ bool dp_rx_is_raw_frame_dropped(qdf_nbuf_t nbuf)
 }
 #endif
 
+#ifdef WLAN_FEATURE_DP_RX_RING_HISTORY
+/**
+ * dp_rx_ring_record_entry() - Record an entry into the rx ring history.
+ * @soc: Datapath soc structure
+ * @ring_num: REO ring number
+ * @ring_desc: REO ring descriptor
+ *
+ * Returns: None
+ */
+static inline void
+dp_rx_ring_record_entry(struct dp_soc *soc, uint8_t ring_num,
+			hal_ring_desc_t ring_desc)
+{
+	struct dp_buf_info_record *record;
+	uint8_t rbm;
+	struct hal_buf_info hbi;
+	uint32_t idx;
+
+	if (qdf_unlikely(!&soc->rx_ring_history[ring_num]))
+		return;
+
+	hal_rx_reo_buf_paddr_get(ring_desc, &hbi);
+	rbm = hal_rx_ret_buf_manager_get(ring_desc);
+
+	idx = dp_history_get_next_index(&soc->rx_ring_history[ring_num]->index,
+					DP_RX_HIST_MAX);
+
+	/* No NULL check needed for record since its an array */
+	record = &soc->rx_ring_history[ring_num]->entry[idx];
+
+	record->timestamp = qdf_get_log_timestamp();
+	record->hbi.paddr = hbi.paddr;
+	record->hbi.sw_cookie = hbi.sw_cookie;
+	record->hbi.rbm = rbm;
+}
+#else
+static inline void
+dp_rx_ring_record_entry(struct dp_soc *soc, uint8_t ring_num,
+			hal_ring_desc_t ring_desc)
+{
+}
+#endif
+
 /**
  * dp_rx_process() - Brain of the Rx processing functionality
  *		     Called from the bottom half (tasklet/NET_RX_SOFTIRQ)
@@ -2071,6 +2114,7 @@ more_data:
 			qdf_assert(0);
 		}
 
+		dp_rx_ring_record_entry(soc, reo_ring_num, ring_desc);
 		rx_buf_cookie = HAL_RX_REO_BUF_COOKIE_GET(ring_desc);
 		status = dp_rx_cookie_check_and_invalidate(ring_desc);
 		if (qdf_unlikely(QDF_IS_STATUS_ERROR(status))) {