diff --git a/dp/cmn_dp_api/dp_cal_client_api.c b/dp/cmn_dp_api/dp_cal_client_api.c
new file mode 100644
index 0000000000..8a7f6080d1
--- /dev/null
+++ b/dp/cmn_dp_api/dp_cal_client_api.c
@@ -0,0 +1,154 @@
+/*
+ * Copyright (c) 2017-2018 The Linux Foundation. All rights reserved.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for
+ * any purpose with or without fee is hereby granted, provided that the
+ * above copyright notice and this permission notice appear in all
+ * copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
+ * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+ * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
+ * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "dp_cal_client_api.h"
+#include "qdf_module.h"
+
+/* dp_cal_client_attach - function to attach cal client timer
+ * @cal_client_ctx: cal client timer context
+ * @pdev: pdev handle
+ * @osdev: device pointer
+ * @dp_iterate_peer_list : function pointer to iterate and update peer stats
+ *
+ * return: void
+ */
+void dp_cal_client_attach(void **cal_client_ctx, void *pdev,
+			  qdf_device_t osdev,
+			  void (*dp_iterate_peer_list)(void *))
+{
+	struct cal_client *cal_cl;
+
+	*cal_client_ctx = qdf_mem_malloc(sizeof(struct cal_client));
+
+	if (!(*cal_client_ctx))
+		return;
+
+	cal_cl = (struct cal_client *)(*cal_client_ctx);
+	cal_cl->iterate_update_peer_list = dp_iterate_peer_list;
+	cal_cl->pdev_hdl = pdev;
+
+	qdf_timer_init(osdev, &cal_cl->cal_client_timer,
+		       dp_cal_client_stats_timer_fn, *cal_client_ctx,
+		       QDF_TIMER_TYPE_WAKE_APPS);
+}
+
+qdf_export_symbol(dp_cal_client_attach);
+
+/* dp_cal_client_detach - detach cal client timer
+ * @cal_client_ctx: cal client timer context
+ *
+ * return: void
+ */
+void dp_cal_client_detach(void **cal_client_ctx)
+{
+	struct cal_client *cal_cl;
+
+	if (*cal_client_ctx) {
+		cal_cl = (struct cal_client *)*cal_client_ctx;
+
+		qdf_timer_stop(&cal_cl->cal_client_timer);
+		qdf_timer_free(&cal_cl->cal_client_timer);
+		qdf_mem_free(cal_cl);
+		*cal_client_ctx = NULL;
+	}
+}
+
+qdf_export_symbol(dp_cal_client_detach);
+
+/* dp_cal_client_timer_start- api to start cal client timer
+ * @ctx: cal client timer ctx
+ *
+ * return: void
+ */
+void dp_cal_client_timer_start(void *ctx)
+{
+	struct cal_client *cal_cl;
+
+	if (ctx) {
+		cal_cl  = (struct cal_client *)ctx;
+		qdf_timer_start(&cal_cl->cal_client_timer, DP_CAL_CLIENT_TIME);
+	}
+}
+
+qdf_export_symbol(dp_cal_client_timer_start);
+
+/* dp_cal_client_timer_stop- api to stop cal client timer
+ * @ctx: cal client timer ctx
+ *
+ * return: void
+ */
+void dp_cal_client_timer_stop(void *ctx)
+{
+	struct cal_client *cal_cl;
+
+	if (ctx) {
+		cal_cl = (struct cal_client *)ctx;
+		qdf_timer_sync_cancel(&cal_cl->cal_client_timer);
+		qdf_timer_stop(&cal_cl->cal_client_timer);
+	}
+}
+
+qdf_export_symbol(dp_cal_client_timer_stop);
+
+/* dp_cal_client_stats_timer_fn- function called on timer interval
+ * @ctx: cal client timer ctx
+ *
+ * return: void
+ */
+void dp_cal_client_stats_timer_fn(void *ctx)
+{
+	struct cal_client *cal_cl = (struct cal_client *)ctx;
+
+	if (!cal_cl)
+		return;
+
+	cal_cl->iterate_update_peer_list(cal_cl->pdev_hdl);
+	qdf_timer_mod(&cal_cl->cal_client_timer, DP_CAL_CLIENT_TIME);
+}
+
+qdf_export_symbol(dp_cal_client_stats_timer_fn);
+
+/*dp_cal_client_update_peer_stats - update peer stats in peer
+ * @peer_stats: cdp peer stats pointer
+ *
+ * return: void
+ */
+void dp_cal_client_update_peer_stats(struct cdp_peer_stats *peer_stats)
+{
+	uint32_t temp_rx_bytes = peer_stats->rx.to_stack.bytes;
+	uint32_t temp_rx_data = peer_stats->rx.to_stack.num;
+	uint32_t temp_tx_bytes = peer_stats->tx.tx_success.bytes;
+	uint32_t temp_tx_data = peer_stats->tx.tx_success.num;
+
+	peer_stats->rx.rx_byte_rate = temp_rx_bytes -
+					peer_stats->rx.rx_bytes_success_last;
+	peer_stats->rx.rx_data_rate  = temp_rx_data -
+					peer_stats->rx.rx_data_success_last;
+	peer_stats->tx.tx_byte_rate = temp_tx_bytes -
+					peer_stats->tx.tx_bytes_success_last;
+	peer_stats->tx.tx_data_rate  = temp_tx_data -
+					peer_stats->tx.tx_data_success_last;
+
+	peer_stats->rx.rx_bytes_success_last = temp_rx_bytes;
+	peer_stats->rx.rx_data_success_last = temp_rx_data;
+	peer_stats->tx.tx_bytes_success_last = temp_tx_bytes;
+	peer_stats->tx.tx_data_success_last = temp_tx_data;
+}
+
+qdf_export_symbol(dp_cal_client_update_peer_stats);
+
diff --git a/dp/wifi3.0/dp_cal_client_api.h b/dp/wifi3.0/dp_cal_client_api.h
new file mode 100644
index 0000000000..7bf9ec43b3
--- /dev/null
+++ b/dp/wifi3.0/dp_cal_client_api.h
@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) 2017-2018 The Linux Foundation. All rights reserved.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for
+ * any purpose with or without fee is hereby granted, provided that the
+ * above copyright notice and this permission notice appear in all
+ * copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
+ * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+ * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
+ * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/**
+ * @file cal_client_api.h
+ * @brief: define timer to update DP stats
+ */
+#ifndef _DP_CAL_CLIENT_H_
+#define _DP_CAL_CLIENT_H_
+
+#include<cdp_txrx_stats_struct.h>
+#include <qdf_timer.h>
+#include <qdf_mem.h>
+
+/*timer will run every 1 sec*/
+#define DP_CAL_CLIENT_TIME 1000
+
+struct cal_client {
+	qdf_timer_t cal_client_timer;
+	void (*iterate_update_peer_list)(void *ctx);
+	void *pdev_hdl;
+};
+
+void dp_cal_client_attach(void **cal_client_ctx, void *pdev, qdf_device_t osdev,
+			  void (*iterate_peer_list)(void *));
+void dp_cal_client_detach(void **cal_client_ctx);
+void dp_cal_client_timer_start(void *ctx);
+void dp_cal_client_timer_stop(void *ctx);
+void dp_cal_client_stats_timer_fn(void *pdev_hdl);
+void dp_cal_client_update_peer_stats(struct cdp_peer_stats *peer_stats);
+
+#ifndef ATH_SUPPORT_EXT_STAT
+void dp_cal_client_attach(void **cal_client_ctx, void *pdev, qdf_device_t osdev,
+			  void (*iterate_peer_list)(void *))
+{
+}
+
+void dp_cal_client_detach(void **cal_client_ctx)
+{
+}
+
+void dp_cal_client_timer_start(void *ctx)
+{
+}
+
+void dp_cal_client_timer_stop(void *ctx)
+{
+}
+
+void dp_cal_client_stats_timer_fn(void *pdev_hdl)
+{
+}
+
+void dp_cal_client_update_peer_stats(struct cdp_peer_stats *peer_stats)
+{
+}
+#endif
+
+#endif /*_DP_CAL_CLIENT_H_*/