qcacmn: Add HIF CE RX support to WBUFF

Currently, WBUFF is being used only for WMI TX buffers.
Add HIF CE RX buffers support to WBUFF in an effort to re-use
the copy engine RX buffers instead of freeing/allocating buffers
for every CE RX transaction. This fixes the problem of CE RX
memory fragmentation.

Change-Id: Id9c043a5c5d0882a7994fa03cd8c335555d46b8d
CRs-Fixed: 3534539

dp/wifi3.0/dp_htt.c

@@ -43,6 +43,7 @@
 #ifdef CONFIG_SAWF_DEF_QUEUES
 #include <dp_sawf_htt.h>
 #endif
+#include <wbuff.h>
 
 #define HTT_TLV_HDR_LEN HTT_T2H_EXT_STATS_CONF_TLV_HDR_SIZE
 
@@ -3685,6 +3686,20 @@ dp_htt_peer_ext_evt(struct htt_soc *soc, uint32_t *msg_word)
 }
 #endif
 
+#ifdef WLAN_FEATURE_CE_RX_BUFFER_REUSE
+static void dp_htt_rx_nbuf_free(qdf_nbuf_t nbuf)
+{
+	nbuf = wbuff_buff_put(nbuf);
+	if (nbuf)
+		qdf_nbuf_free(nbuf);
+}
+#else
+static inline void dp_htt_rx_nbuf_free(qdf_nbuf_t nbuf)
+{
+	return qdf_nbuf_free(nbuf);
+}
+#endif
+
 void dp_htt_t2h_msg_handler(void *context, HTC_PACKET *pkt)
 {
 	struct htt_soc *soc = (struct htt_soc *) context;
@@ -3698,7 +3713,7 @@ void dp_htt_t2h_msg_handler(void *context, HTC_PACKET *pkt)
 		if (pkt->Status != QDF_STATUS_E_CANCELED)
 			soc->stats.htc_err_cnt++;
 
-		qdf_nbuf_free(htt_t2h_msg);
+		dp_htt_rx_nbuf_free(htt_t2h_msg);
 		return;
 	}
 
@@ -4150,7 +4165,7 @@ void dp_htt_t2h_msg_handler(void *context, HTC_PACKET *pkt)
 
 	/* Free the indication buffer */
 	if (free_buf)
-		qdf_nbuf_free(htt_t2h_msg);
+		dp_htt_rx_nbuf_free(htt_t2h_msg);
 }
 
 enum htc_send_full_action

hif/src/ce/ce_main.c

@@ -40,6 +40,7 @@
 #include "ce_tasklet.h"
 #include "qdf_module.h"
 #include "qdf_ssr_driver_dump.h"
+#include <wbuff.h>
 
 #define CE_POLL_TIMEOUT 10      /* ms */
 
@@ -3300,6 +3301,141 @@ hif_pci_ce_send_done(struct CE_handle *copyeng, void *ce_context,
 			&toeplitz_hash_result) == QDF_STATUS_SUCCESS);
 }
 
+#ifdef WLAN_FEATURE_CE_RX_BUFFER_REUSE
+
+#define HIF_CE_RX_NBUF_WMI_POOL_SIZE 32
+
+static qdf_nbuf_t hif_ce_rx_nbuf_alloc(struct hif_softc *scn, uint8_t ce_id)
+{
+	struct HIF_CE_state *hif_state = HIF_GET_CE_STATE(scn);
+	struct HIF_CE_pipe_info *pipe_info = &hif_state->pipe_info[ce_id];
+	qdf_nbuf_t nbuf;
+
+	nbuf = wbuff_buff_get(scn->wbuff_handle, ce_id, 0, __func__,
+			      __LINE__);
+	if (!nbuf)
+		nbuf = qdf_nbuf_alloc(scn->qdf_dev, pipe_info->buf_sz,
+				      0, 4, false);
+
+	if (!nbuf)
+		return NULL;
+
+	return nbuf;
+}
+
+static void hif_ce_rx_nbuf_free(qdf_nbuf_t nbuf)
+{
+	nbuf = wbuff_buff_put(nbuf);
+	if (nbuf)
+		qdf_nbuf_free(nbuf);
+}
+
+static int
+hif_calc_wbuff_pool_size(struct hif_softc *scn, struct CE_state *ce_state)
+{
+	int ul_is_polled, dl_is_polled;
+	bool is_wmi_svc, wmi_diag_svc;
+	uint8_t ul_pipe, dl_pipe;
+	int pool_size;
+	int status;
+	int ce_id;
+
+	if (!ce_state)
+		return 0;
+
+	ce_id = ce_state->id;
+
+	status = hif_map_service_to_pipe(&scn->osc, WMI_CONTROL_SVC,
+					 &ul_pipe, &dl_pipe,
+					 &ul_is_polled, &dl_is_polled);
+	is_wmi_svc = !status && (dl_pipe == ce_id);
+
+	status = hif_map_service_to_pipe(GET_HIF_OPAQUE_HDL(scn),
+					 WMI_CONTROL_DIAG_SVC,
+					 &ul_pipe, &dl_pipe,
+					 &ul_is_polled, &dl_is_polled);
+	wmi_diag_svc = !status;
+
+	if (is_wmi_svc && !wmi_diag_svc)
+		pool_size = ce_state->dest_ring->nentries +
+			HIF_CE_RX_NBUF_WMI_POOL_SIZE;
+	else if (is_wmi_svc && wmi_diag_svc)
+		pool_size = ce_state->dest_ring->nentries +
+			HIF_CE_RX_NBUF_WMI_POOL_SIZE / 2;
+	else if (!is_wmi_svc && wmi_diag_svc && ce_id == dl_pipe)
+		pool_size = ce_state->dest_ring->nentries +
+			HIF_CE_RX_NBUF_WMI_POOL_SIZE / 2;
+	else
+		pool_size = ce_state->dest_ring->nentries;
+
+	return pool_size;
+}
+
+static void hif_ce_rx_wbuff_register(struct hif_softc *scn)
+{
+	struct wbuff_alloc_request wbuff_alloc[CE_COUNT_MAX] = {0};
+	struct HIF_CE_state *hif_state = HIF_GET_CE_STATE(scn);
+	struct HIF_CE_pipe_info *pipe_info;
+	struct CE_state *ce_state;
+	int ce_id;
+
+	for (ce_id = 0; ce_id <  scn->ce_count; ce_id++) {
+		pipe_info = &hif_state->pipe_info[ce_id];
+		ce_state = scn->ce_id_to_state[ce_id];
+
+		if (!pipe_info->buf_sz)
+			continue;
+
+		/* Only RX CEs need WBUFF registration. recv_bufs_needed
+		 * contains valid count for RX CEs during init time.
+		 */
+		if (!atomic_read(&pipe_info->recv_bufs_needed))
+			continue;
+
+		if (ce_is_fastpath_enabled(scn) &&
+		    ce_state->htt_rx_data)
+			continue;
+
+		wbuff_alloc[ce_id].pool_id = ce_id;
+		wbuff_alloc[ce_id].buffer_size = pipe_info->buf_sz;
+		wbuff_alloc[ce_id].pool_size =
+				hif_calc_wbuff_pool_size(scn, ce_state);
+	}
+
+	scn->wbuff_handle =
+		wbuff_module_register(wbuff_alloc, CE_COUNT_MAX, 0, 4,
+				      WBUFF_MODULE_CE_RX);
+}
+
+static void hif_ce_rx_wbuff_deregister(struct hif_softc *scn)
+{
+	wbuff_module_deregister(scn->wbuff_handle);
+	scn->wbuff_handle = NULL;
+}
+#else
+static inline qdf_nbuf_t
+hif_ce_rx_nbuf_alloc(struct hif_softc *scn, uint8_t ce_id)
+{
+	struct HIF_CE_state *hif_state = HIF_GET_CE_STATE(scn);
+	struct HIF_CE_pipe_info *pipe_info = &hif_state->pipe_info[ce_id];
+
+	return qdf_nbuf_alloc(scn->qdf_dev, pipe_info->buf_sz, 0, 4, false);
+}
+
+static inline void hif_ce_rx_nbuf_free(qdf_nbuf_t nbuf)
+{
+	return qdf_nbuf_free(nbuf);
+}
+
+static inline void hif_ce_rx_wbuff_register(struct hif_softc *scn)
+{
+}
+
+static inline void hif_ce_rx_wbuff_deregister(struct hif_softc *scn)
+{
+}
+#endif /* WLAN_FEATURE_CE_RX_BUFFER_REUSE */
+
 /**
  * hif_ce_do_recv(): send message from copy engine to upper layers
  * @msg_callbacks: structure containing callback and callback context
@@ -3322,7 +3458,7 @@ static inline void hif_ce_do_recv(struct hif_msg_callbacks *msg_callbacks,
 					netbuf, pipe_info->pipe_num);
 	} else {
 		hif_err("Invalid Rx msg buf: %pK nbytes: %d", netbuf, nbytes);
-		qdf_nbuf_free(netbuf);
+		hif_ce_rx_nbuf_free(netbuf);
 	}
 }
 
@@ -3350,7 +3486,7 @@ hif_pci_ce_recv_data(struct CE_handle *copyeng, void *ce_context,
 		atomic_inc(&pipe_info->recv_bufs_needed);
 		hif_post_recv_buffers_for_pipe(pipe_info);
 		if (scn->target_status == TARGET_STATUS_RESET)
-			qdf_nbuf_free(transfer_context);
+			hif_ce_rx_nbuf_free(transfer_context);
 		else
 			hif_ce_do_recv(msg_callbacks, transfer_context,
 				nbytes, pipe_info);
@@ -3599,7 +3735,7 @@ QDF_STATUS hif_post_recv_buffers_for_pipe(struct HIF_CE_pipe_info *pipe_info)
 		hif_record_ce_desc_event(scn, ce_id,
 					 HIF_RX_DESC_PRE_NBUF_ALLOC, NULL, NULL,
 					 0, 0);
-		nbuf = qdf_nbuf_alloc(scn->qdf_dev, buf_sz, 0, 4, false);
+		nbuf = hif_ce_rx_nbuf_alloc(scn, ce_id);
 		if (!nbuf) {
 			hif_post_recv_buffers_failure(pipe_info, nbuf,
 					&pipe_info->nbuf_alloc_err_count,
@@ -3624,7 +3760,7 @@ QDF_STATUS hif_post_recv_buffers_for_pipe(struct HIF_CE_pipe_info *pipe_info)
 					&pipe_info->nbuf_dma_err_count,
 					 HIF_RX_NBUF_MAP_FAILURE,
 					"HIF_RX_NBUF_MAP_FAILURE");
-			qdf_nbuf_free(nbuf);
+			hif_ce_rx_nbuf_free(nbuf);
 			return status;
 		}
 
@@ -3643,7 +3779,7 @@ QDF_STATUS hif_post_recv_buffers_for_pipe(struct HIF_CE_pipe_info *pipe_info)
 
 			qdf_nbuf_unmap_single(scn->qdf_dev, nbuf,
 						QDF_DMA_FROM_DEVICE);
-			qdf_nbuf_free(nbuf);
+			hif_ce_rx_nbuf_free(nbuf);
 			return status;
 		}
 
@@ -3813,6 +3949,8 @@ QDF_STATUS hif_start(struct hif_opaque_softc *hif_ctx)
 	if (hif_completion_thread_startup(hif_state))
 		return QDF_STATUS_E_FAILURE;
 
+	hif_ce_rx_wbuff_register(scn);
+
 	/* enable buffer cleanup */
 	hif_state->started = true;
 
@@ -3865,7 +4003,7 @@ static void hif_recv_buffer_cleanup_on_pipe(struct HIF_CE_pipe_info *pipe_info)
 		if (netbuf) {
 			qdf_nbuf_unmap_single(scn->qdf_dev, netbuf,
 					      QDF_DMA_FROM_DEVICE);
-			qdf_nbuf_free(netbuf);
+			hif_ce_rx_nbuf_free(netbuf);
 		}
 	}
 }
@@ -4002,6 +4140,7 @@ void hif_ce_stop(struct hif_softc *scn)
 	}
 
 	hif_buffer_cleanup(hif_state);
+	hif_ce_rx_wbuff_deregister(scn);
 
 	for (pipe_num = 0; pipe_num < scn->ce_count; pipe_num++) {
 		struct HIF_CE_pipe_info *pipe_info;

hif/src/hif_main.h

@@ -499,6 +499,9 @@ struct hif_softc {
 	struct qdf_mem_multi_page_t dl_recv_pages;
 	int dl_recv_pipe_num;
 #endif
+#ifdef WLAN_FEATURE_CE_RX_BUFFER_REUSE
+	struct wbuff_mod_handle *wbuff_handle;
+#endif
 #ifdef FEATURE_HIF_DELAYED_REG_WRITE
 	/* queue(array) to hold register writes */
 	struct hif_reg_write_q_elem *reg_write_queue;

htc/htc_recv.c

@@ -21,6 +21,7 @@
 #include "htc_internal.h"
 #include "htc_credit_history.h"
 #include <qdf_nbuf.h>           /* qdf_nbuf_t */
+#include <wbuff.h>
 
 #if defined(WLAN_DEBUG) || defined(DEBUG)
 void debug_dump_bytes(uint8_t *buffer, uint16_t length, char *pDescription)
@@ -71,6 +72,20 @@ static A_STATUS htc_process_trailer(HTC_TARGET *target,
 				    uint8_t *pBuffer,
 				    int Length, HTC_ENDPOINT_ID FromEndpoint);
 
+#ifdef WLAN_FEATURE_CE_RX_BUFFER_REUSE
+static void htc_rx_nbuf_free(qdf_nbuf_t nbuf)
+{
+	nbuf = wbuff_buff_put(nbuf);
+	if (nbuf)
+		qdf_nbuf_free(nbuf);
+}
+#else
+static inline void htc_rx_nbuf_free(qdf_nbuf_t nbuf)
+{
+	return qdf_nbuf_free(nbuf);
+}
+#endif
+
 static void do_recv_completion_pkt(HTC_ENDPOINT *pEndpoint,
 				   HTC_PACKET *pPacket)
 {
@@ -80,7 +95,7 @@ static void do_recv_completion_pkt(HTC_ENDPOINT *pEndpoint,
 				 pEndpoint->Id,
 				 pPacket));
 		if (pPacket)
-			qdf_nbuf_free(pPacket->pPktContext);
+			htc_rx_nbuf_free(pPacket->pPktContext);
 	} else {
 		AR_DEBUG_PRINTF(ATH_DEBUG_RECV,
 				("HTC calling ep %d recv callback on packet %pK\n",
@@ -210,7 +225,7 @@ qdf_nbuf_t rx_sg_to_single_netbuf(HTC_TARGET *target)
 		qdf_mem_copy(anbdata_new, anbdata, qdf_nbuf_len(skb));
 		qdf_nbuf_put_tail(new_skb, qdf_nbuf_len(skb));
 		anbdata_new += qdf_nbuf_len(skb);
-		qdf_nbuf_free(skb);
+		htc_rx_nbuf_free(skb);
 		skb = qdf_nbuf_queue_remove(rx_sg_queue);
 	} while (skb);
 
@@ -220,7 +235,7 @@ qdf_nbuf_t rx_sg_to_single_netbuf(HTC_TARGET *target)
 _failed:
 
 	while ((skb = qdf_nbuf_queue_remove(rx_sg_queue)) != NULL)
-		qdf_nbuf_free(skb);
+		htc_rx_nbuf_free(skb);
 
 	RESET_RX_SG_CONFIG(target);
 	return NULL;
@@ -478,7 +493,7 @@ QDF_STATUS htc_rx_completion_handler(void *Context, qdf_nbuf_t netbuf,
 				break;
 			}
 
-			qdf_nbuf_free(netbuf);
+			htc_rx_nbuf_free(netbuf);
 			netbuf = NULL;
 			break;
 		}
@@ -516,7 +531,7 @@ _out:
 #endif
 
 	if (netbuf)
-		qdf_nbuf_free(netbuf);
+		htc_rx_nbuf_free(netbuf);
 
 	return status;
 

wbuff/inc/wbuff.h

@@ -28,8 +28,13 @@
 #include <qdf_status.h>
 #include <qdf_nbuf.h>
 
+/* Number of pools supported per module */
+#define WBUFF_MAX_POOLS 16
+#define WBUFF_MAX_POOL_ID WBUFF_MAX_POOLS
+
 enum wbuff_module_id {
 	WBUFF_MODULE_WMI_TX,
+	WBUFF_MODULE_CE_RX,
 	WBUFF_MAX_MODULES,
 };
 
@@ -93,6 +98,7 @@ QDF_STATUS wbuff_module_deregister(struct wbuff_mod_handle *hdl);
 /**
  * wbuff_buff_get() - return buffer to the requester
  * @hdl: wbuff_handle corresponding to the module
+ * @pool_id: pool identifier
  * @len: length of buffer requested
  * @func_name: function from which buffer is requested
  * @line_num: line number in the file
@@ -100,7 +106,8 @@ QDF_STATUS wbuff_module_deregister(struct wbuff_mod_handle *hdl);
  * Return: Network buffer if success
  *         NULL if failure
  */
-qdf_nbuf_t wbuff_buff_get(struct wbuff_mod_handle *hdl, uint32_t len,
+qdf_nbuf_t
+wbuff_buff_get(struct wbuff_mod_handle *hdl, uint8_t pool_id, uint32_t len,
 	       const char *func_name, uint32_t line_num);
 
 /**
@@ -137,8 +144,8 @@ static inline QDF_STATUS wbuff_module_deregister(struct wbuff_mod_handle *hdl)
 }
 
 static inline qdf_nbuf_t
-wbuff_buff_get(struct wbuff_mod_handle *hdl, uint32_t len, const char *func_name,
-	       uint32_t line_num)
+wbuff_buff_get(struct wbuff_mod_handle *hdl, uint8_t pool_id, uint32_t len,
+	       const char *func_name, uint32_t line_num)
 {
 	return NULL;
 }

wbuff/src/i_wbuff.h

@@ -26,9 +26,7 @@
 #define _I_WBUFF_H
 
 #include <qdf_nbuf.h>
-
-/* Number of pools supported per module */
-#define WBUFF_MAX_POOLS 4
+#include <wbuff.h>
 
 #define WBUFF_MODULE_ID_SHIFT 4
 #define WBUFF_MODULE_ID_BITMASK 0xF0

wbuff/src/wbuff.c

@@ -203,6 +203,9 @@ wbuff_module_register(struct wbuff_alloc_request *req, uint8_t num_pools,
 		len = req[i].buffer_size;
 		wbuff_pool = &mod->wbuff_pool[pool_id];
 
+		if (!pool_size)
+			continue;
+
 		/**
 		 * Allocate pool_size number of buffers for
 		 * the pool given by pool_id
@@ -240,6 +243,7 @@ QDF_STATUS wbuff_module_deregister(struct wbuff_mod_handle *hdl)
 	struct wbuff_module *mod = NULL;
 	uint8_t module_id = 0, pool_id = 0;
 	qdf_nbuf_t first = NULL, buf = NULL;
+	struct wbuff_pool *wbuff_pool;
 
 	handle = (struct wbuff_handle *)hdl;
 
@@ -251,7 +255,12 @@ QDF_STATUS wbuff_module_deregister(struct wbuff_mod_handle *hdl)
 
 	qdf_spin_lock_bh(&mod->lock);
 	for (pool_id = 0; pool_id < WBUFF_MAX_POOLS; pool_id++) {
-		first = mod->wbuff_pool[pool_id].pool;
+		wbuff_pool = &mod->wbuff_pool[pool_id];
+
+		if (!wbuff_pool->initialized)
+			continue;
+
+		first = wbuff_pool->pool;
 		while (first) {
 			buf = first;
 			first = qdf_nbuf_next(buf);
@@ -264,26 +273,29 @@ QDF_STATUS wbuff_module_deregister(struct wbuff_mod_handle *hdl)
 	return QDF_STATUS_SUCCESS;
 }
 
-qdf_nbuf_t wbuff_buff_get(struct wbuff_mod_handle *hdl, uint32_t len,
+qdf_nbuf_t
+wbuff_buff_get(struct wbuff_mod_handle *hdl, uint8_t pool_id, uint32_t len,
 	       const char *func_name, uint32_t line_num)
 {
 	struct wbuff_handle *handle;
 	struct wbuff_module *mod = NULL;
 	struct wbuff_pool *wbuff_pool;
 	uint8_t module_id = 0;
-	uint8_t pool_id = 0;
 	qdf_nbuf_t buf = NULL;
 
 	handle = (struct wbuff_handle *)hdl;
 
-	if ((!wbuff.initialized) || (!wbuff_is_valid_handle(handle)) || !len)
+	if ((!wbuff.initialized) || (!wbuff_is_valid_handle(handle)) ||
+	    ((pool_id >= WBUFF_MAX_POOL_ID && !len)))
 		return NULL;
 
 	module_id = handle->id;
 	mod = &wbuff.mod[module_id];
 
+	if (pool_id == WBUFF_MAX_POOL_ID && len)
 		pool_id = wbuff_get_pool_slot_from_len(mod, len);
-	if (pool_id == WBUFF_MAX_POOLS)
+
+	if (pool_id >= WBUFF_MAX_POOLS)
 		return NULL;
 
 	wbuff_pool = &mod->wbuff_pool[pool_id];

wmi/src/wmi_unified.c

@@ -1768,8 +1768,8 @@ wmi_buf_alloc_debug(wmi_unified_t wmi_handle, uint32_t len,
 		return NULL;
 	}
 
-	wmi_buf = wbuff_buff_get(wmi_handle->wbuff_handle, len, func_name,
-				 line_num);
+	wmi_buf = wbuff_buff_get(wmi_handle->wbuff_handle, WBUFF_MAX_POOL_ID,
+				 len, func_name, line_num);
 	if (!wmi_buf)
 		wmi_buf = qdf_nbuf_alloc_debug(NULL,
 					       roundup(len + WMI_MIN_HEAD_ROOM,
@@ -1810,8 +1810,8 @@ wmi_buf_t wmi_buf_alloc_fl(wmi_unified_t wmi_handle, uint32_t len,
 		return NULL;
 	}
 
-	wmi_buf = wbuff_buff_get(wmi_handle->wbuff_handle, len, __func__,
-				 __LINE__);
+	wmi_buf = wbuff_buff_get(wmi_handle->wbuff_handle, WBUFF_MAX_POOL_ID,
+				 len, __func__, __LINE__);
 	if (!wmi_buf)
 		wmi_buf = qdf_nbuf_alloc_fl(NULL, roundup(len +
 				WMI_MIN_HEAD_ROOM, 4), WMI_MIN_HEAD_ROOM, 4,
@@ -2653,6 +2653,20 @@ static void wmi_mtrace_rx(uint32_t message_id, uint16_t vdev_id, uint32_t data)
 		   mtrace_message_id, vdev_id, data);
 }
 
+#ifdef WLAN_FEATURE_CE_RX_BUFFER_REUSE
+static void wmi_rx_nbuf_free(qdf_nbuf_t nbuf)
+{
+	nbuf = wbuff_buff_put(nbuf);
+	if (nbuf)
+		qdf_nbuf_free(nbuf);
+}
+#else
+static inline void wmi_rx_nbuf_free(qdf_nbuf_t nbuf)
+{
+	return qdf_nbuf_free(nbuf);
+}
+#endif
+
 /**
  * wmi_process_control_rx() - process fw events callbacks
  * @wmi_handle: handle to wmi_unified
@@ -2672,7 +2686,7 @@ static void wmi_process_control_rx(struct wmi_unified *wmi_handle,
 	idx = wmi_unified_get_event_handler_ix(wmi_handle, id);
 	if (qdf_unlikely(idx == A_ERROR)) {
 		wmi_debug("no handler registered for event id 0x%x", id);
-		qdf_nbuf_free(evt_buf);
+		wmi_rx_nbuf_free(evt_buf);
 		return;
 	}
 	wmi_mtrace_rx(id, 0xFF, idx);
@@ -2714,7 +2728,7 @@ static void wmi_process_control_rx(struct wmi_unified *wmi_handle,
 							    evt_buf);
 	} else {
 		wmi_err("Invalid event context %d", exec_ctx);
-		qdf_nbuf_free(evt_buf);
+		wmi_rx_nbuf_free(evt_buf);
 	}
 
 }
@@ -2738,7 +2752,7 @@ static void wmi_control_rx(void *ctx, HTC_PACKET *htc_packet)
 	if (!wmi_handle) {
 		wmi_err("unable to get wmi_handle to Endpoint %d",
 			htc_packet->Endpoint);
-		qdf_nbuf_free(evt_buf);
+		wmi_rx_nbuf_free(evt_buf);
 		return;
 	}
 
@@ -2766,7 +2780,7 @@ static void wmi_control_diag_rx(void *ctx, HTC_PACKET *htc_packet)
 
 	if (!wmi_handle) {
 		wmi_err("unable to get wmi_handle for diag event end point id:%d", htc_packet->Endpoint);
-		qdf_nbuf_free(evt_buf);
+		wmi_rx_nbuf_free(evt_buf);
 		return;
 	}
 
@@ -2794,7 +2808,7 @@ static void wmi_control_dbr_rx(void *ctx, HTC_PACKET *htc_packet)
 	if (!wmi_handle) {
 		wmi_err("unable to get wmi_handle for dbr event endpoint id:%d",
 			htc_packet->Endpoint);
-		qdf_nbuf_free(evt_buf);
+		wmi_rx_nbuf_free(evt_buf);
 		return;
 	}
 
@@ -2972,7 +2986,7 @@ end:
 		wmi_handle->ops->wmi_free_allocated_event(id, &wmi_cmd_struct_ptr);
 #endif
 
-	qdf_nbuf_free(evt_buf);
+	wmi_rx_nbuf_free(evt_buf);
 
 }