qca-nss-drv/nss_wifi_ext_vdev.c - manifest_repos/sdk - Git at Google

 /*
  **************************************************************************
  * Copyright (c) 2020, 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 "nss_tx_rx_common.h"
 #include "nss_wifi_ext_vdev_stats.h"
 #include "nss_wifi_ext_vdev_log.h"

 #define NSS_WIFI_EXT_VDEV_TX_TIMEOUT 3000 /* 3 seconds */

 /*
  * Private data structure
  */
 static struct nss_wifi_ext_vdev_pvt {
 	struct semaphore sem;
 	struct completion complete;
 	int response;
 	void *cb;
 	void *app_data;
 } wifi_ext_vdev_pvt;

 /*
  * nss_wifi_ext_vdev_verify_if_num()
  *	Verify if_num passed to us.
  */
 static bool nss_wifi_ext_vdev_verify_if_num(uint32_t if_num)
 {
 	uint32_t type = nss_dynamic_interface_get_type(nss_wifi_ext_vdev_get_ctx(), if_num);

 	switch (type) {
 	case NSS_DYNAMIC_INTERFACE_TYPE_WIFI_EXT_VDEV_WDS:
 	case NSS_DYNAMIC_INTERFACE_TYPE_WIFI_EXT_VDEV_VLAN:
 		return true;
 	default:
 		return false;
 	}
 }

 /*
  * nss_wifi_ext_vdev_handler()
  *	Handle NSS -> HLOS messages for wifi_ext_vdev
  */
 static void nss_wifi_ext_vdev_handler(struct nss_ctx_instance *nss_ctx, struct nss_cmn_msg *ncm, void *app_data)
 {
 	struct nss_wifi_ext_vdev_msg *nwevm = (struct nss_wifi_ext_vdev_msg *)ncm;
 	void *ctx;

 	nss_wifi_ext_vdev_msg_callback_t cb;

 	NSS_VERIFY_CTX_MAGIC(nss_ctx);
 	BUG_ON(!nss_wifi_ext_vdev_verify_if_num(ncm->interface));

 	/*
 	 * Trace Messages
 	 */
 	nss_wifi_ext_vdev_log_rx_msg(nwevm);

 	/*
 	 * Is this a valid request/response packet?
 	 */
 	if (ncm->type >= NSS_WIFI_EXT_VDEV_MSG_MAX) {
 		nss_warning("%px: received invalid message %d for WiFi extended VAP interface %d", nss_ctx, ncm->type, ncm->interface);
 		return;
 	}

 	if (nss_cmn_get_msg_len(ncm) > sizeof(struct nss_wifi_ext_vdev_msg)) {
 		nss_warning("%px: wifi_ext_vdev message length is invalid: %d", nss_ctx, ncm->len);
 		return;
 	}

 	/*
 	 * Check messages
 	 */
 	switch (nwevm->cm.type) {
 	case NSS_WIFI_EXT_VDEV_MSG_STATS_SYNC:
 		nss_wifi_ext_vdev_stats_sync(nss_ctx, &nwevm->msg.stats, ncm->interface);
 		break;
 	}

 	/*
 	 * Update the callback and app_data for NOTIFY messages
 	 */
 	if (ncm->response == NSS_CMN_RESPONSE_NOTIFY) {
 		ncm->cb = (nss_ptr_t)nss_core_get_msg_handler(nss_ctx, ncm->interface);
 		ncm->app_data = (nss_ptr_t)nss_ctx->subsys_dp_register[ncm->interface].app_data;
 	}

 	nss_core_log_msg_failures(nss_ctx, ncm);

 	/*
 	 * callback
 	 */
 	cb = (nss_wifi_ext_vdev_msg_callback_t)ncm->cb;
 	ctx = (void *)ncm->app_data;

 	/*
 	 * call the callback
 	 */
 	if (!cb) {
 		return;
 	}

 	cb(ctx, ncm);
 }

 /*
  * nss_wifi_ext_vdev_msg_init()
  *	Initialize wifi message.
  */
 void nss_wifi_ext_vdev_msg_init(struct nss_wifi_ext_vdev_msg *nim, uint32_t if_num,
 			uint32_t type, uint32_t len,
 			nss_wifi_ext_vdev_msg_callback_t cb, void *app_data)
 {
 	nss_cmn_msg_init(&nim->cm, if_num, type, len, cb, app_data);
 }
 EXPORT_SYMBOL(nss_wifi_ext_vdev_msg_init);

 /*
  * nss_wifi_ext_vdev_tx_msg()
  *	Transmit a wifi vdev message to NSSFW
  */
 nss_tx_status_t nss_wifi_ext_vdev_tx_msg(struct nss_ctx_instance *nss_ctx, struct nss_wifi_ext_vdev_msg *msg)
 {
 	struct nss_cmn_msg *ncm = &msg->cm;

 	/*
 	 * Trace Messages
 	 */
 	nss_wifi_ext_vdev_log_tx_msg(msg);

 	if (ncm->type >= NSS_WIFI_EXT_VDEV_MSG_MAX) {
 		nss_warning("%px: wifi vdev message type out of range: %d", nss_ctx, ncm->type);
 		return NSS_TX_FAILURE;
 	}

 	BUG_ON(!nss_wifi_ext_vdev_verify_if_num(ncm->interface));

 	return nss_core_send_cmd(nss_ctx, msg, sizeof(*msg), NSS_NBUF_PAYLOAD_SIZE);
 }
 EXPORT_SYMBOL(nss_wifi_ext_vdev_tx_msg);

 /*
  * nss_wifi_ext_vdev_callback()
  *	Callback to handle the completion of NSS->HLOS messages.
  */
 static void nss_wifi_ext_vdev_callback(void *app_data, struct nss_cmn_msg *ncm)
 {
 	nss_wifi_ext_vdev_msg_callback_t callback = (nss_wifi_ext_vdev_msg_callback_t)wifi_ext_vdev_pvt.cb;
 	void *data = wifi_ext_vdev_pvt.app_data;

 	wifi_ext_vdev_pvt.response = NSS_TX_SUCCESS;
 	wifi_ext_vdev_pvt.cb = NULL;
 	wifi_ext_vdev_pvt.app_data = NULL;

 	if (ncm->response != NSS_CMN_RESPONSE_ACK) {
 		nss_warning("WiFi extension vap Error response %d\n", ncm->response);
 		wifi_ext_vdev_pvt.response = NSS_TX_FAILURE;
 	}

 	if (callback) {
 		callback(data, ncm);
 	}
 	complete(&wifi_ext_vdev_pvt.complete);
 }

 /*
  * nss_wifi_ext_vdev_tx_msg()
  *	Transmit a WiFi extended virtual interface to NSS firmware synchronously.
  */
 nss_tx_status_t nss_wifi_ext_vdev_tx_msg_sync(struct nss_ctx_instance *nss_ctx, struct nss_wifi_ext_vdev_msg *nwevm)
 {
 	nss_tx_status_t status;
 	int ret = 0;

 	down(&wifi_ext_vdev_pvt.sem);
 	wifi_ext_vdev_pvt.cb = (void *)nwevm->cm.cb;
 	wifi_ext_vdev_pvt.app_data = (void *)nwevm->cm.app_data;

 	nwevm->cm.cb = (nss_ptr_t)nss_wifi_ext_vdev_callback;
 	nwevm->cm.app_data = (nss_ptr_t)NULL;

 	status = nss_wifi_ext_vdev_tx_msg(nss_ctx, nwevm);
 	if (status != NSS_TX_SUCCESS) {
 		nss_warning("%px: wifi_ext_vdev_tx_msg failed\n", nss_ctx);
 		up(&wifi_ext_vdev_pvt.sem);
 		return status;
 	}

 	/*
 	 * Wait for the acknowledgement
 	 */
 	ret = wait_for_completion_timeout(&wifi_ext_vdev_pvt.complete, msecs_to_jiffies(NSS_WIFI_EXT_VDEV_TX_TIMEOUT));
 	if (!ret) {
 		nss_warning("%px: WiFi extended vap msg tx failed due to timeout\n", nss_ctx);
 		wifi_ext_vdev_pvt.response = NSS_TX_FAILURE;
 	}

 	status = wifi_ext_vdev_pvt.response;
 	up(&wifi_ext_vdev_pvt.sem);
 	return status;
 }
 EXPORT_SYMBOL(nss_wifi_ext_vdev_tx_msg_sync);

 /*
  * nss_wifi_ext_vdev_tx_buf
  * 	Send data packet for vap processing
  */
 nss_tx_status_t nss_wifi_ext_vdev_tx_buf(struct nss_ctx_instance *nss_ctx, struct sk_buff *skb, uint32_t if_num)
 {
 	BUG_ON(!nss_wifi_ext_vdev_verify_if_num(if_num));

 	return nss_core_send_packet(nss_ctx, skb, if_num, H2N_BIT_FLAG_BUFFER_REUSABLE);
 }
 EXPORT_SYMBOL(nss_wifi_ext_vdev_tx_buf);

 /*
  * nss_wifi_ext_vdev_set_next_hop()
  *	Set the WiFI extended vap next hop.
  */
 nss_tx_status_t nss_wifi_ext_vdev_set_next_hop(struct nss_ctx_instance *ctx, int if_num, int next_hop)
 {
 	struct nss_wifi_ext_vdev_msg *nwevm = kzalloc(sizeof(struct nss_wifi_ext_vdev_msg), GFP_KERNEL);
 	struct nss_wifi_ext_vdev_set_next_hop_msg *nhm = NULL;
 	nss_tx_status_t status;

 	if (!nwevm) {
 		nss_warning("%px: Unable to allocate next hop message", ctx);
 		return NSS_TX_FAILURE;
 	}

 	nhm = &nwevm->msg.wnhm;

 	nhm->if_num = next_hop;
 	nss_wifi_ext_vdev_msg_init(nwevm, if_num, NSS_WIFI_EXT_VDEV_SET_NEXT_HOP,
 			sizeof(struct nss_wifi_ext_vdev_set_next_hop_msg), NULL, NULL);

 	status = nss_wifi_ext_vdev_tx_msg(ctx, nwevm);
 	if (status != NSS_TX_SUCCESS) {
 		nss_warning("%px: Unable to send next hop message", ctx);
 	}

 	kfree(nwevm);
 	return status;
 }
 EXPORT_SYMBOL(nss_wifi_ext_vdev_set_next_hop);

 /*
  * nss_get_wifi_ext_vdev_ext_context()
  *	Return the core ctx which the feature is on
  */
 struct nss_ctx_instance *nss_wifi_ext_vdev_get_ctx(void)
 {
 	return (struct nss_ctx_instance *)&nss_top_main.nss[nss_top_main.wifi_handler_id];
 }
 EXPORT_SYMBOL(nss_wifi_ext_vdev_get_ctx);

 /*
  * nss_wifi_ext_vdev_register_if()
  */
 struct nss_ctx_instance *nss_wifi_ext_vdev_register_if(uint32_t if_num,
 				nss_wifi_ext_vdev_data_callback_t data_callback,
 				nss_wifi_ext_vdev_ext_data_callback_t ext_callback,
 				nss_wifi_ext_vdev_msg_callback_t event_callback,
 				struct net_device *netdev,
 				uint32_t features, void *app_data)
 {
 	struct nss_ctx_instance *nss_ctx = nss_wifi_ext_vdev_get_ctx();

 	BUG_ON(!nss_wifi_ext_vdev_verify_if_num(if_num));

 	nss_core_register_subsys_dp(nss_ctx, if_num, data_callback, ext_callback, app_data, netdev, features);

 	nss_core_register_msg_handler(nss_ctx, if_num, event_callback);

 	nss_core_register_handler(nss_ctx, if_num, nss_wifi_ext_vdev_handler, app_data);

 	nss_wifi_ext_vdev_stats_register(if_num, netdev);

 	return nss_ctx;
 }
 EXPORT_SYMBOL(nss_wifi_ext_vdev_register_if);

 /*
  * nss_wifi_ext_vdev_unregister_if()
  */
 bool nss_wifi_ext_vdev_unregister_if(uint32_t if_num)
 {
 	struct nss_ctx_instance *nss_ctx = nss_wifi_ext_vdev_get_ctx();
 	struct net_device *netdev;

 	BUG_ON(!nss_wifi_ext_vdev_verify_if_num(if_num));

 	nss_assert(nss_ctx);

 	netdev = nss_cmn_get_interface_dev(nss_ctx, if_num);
 	if (!netdev) {
 		nss_warning("%px: Unable to find net device for the interface %d\n", nss_ctx, if_num);
 		return false;
 	}
 	nss_core_unregister_subsys_dp(nss_ctx, if_num);

 	nss_core_unregister_msg_handler(nss_ctx, if_num);

 	nss_core_unregister_handler(nss_ctx, if_num);

 	nss_wifi_ext_vdev_stats_unregister(if_num, netdev);
 	return true;
 }
 EXPORT_SYMBOL(nss_wifi_ext_vdev_unregister_if);

 /*
  * nss_wifi_ext_vdev_register_handler()
  *	Register debugfs handler received on base interface
  */
 void nss_wifi_ext_vdev_register_handler(void)
 {
 	struct nss_ctx_instance *nss_ctx = nss_wifi_ext_vdev_get_ctx();

 	nss_info("nss_wifi_ext_vdev_handler");
 	sema_init(&wifi_ext_vdev_pvt.sem, 1);
 	init_completion(&wifi_ext_vdev_pvt.complete);
 	nss_core_register_handler(nss_ctx, NSS_WIFI_EXT_VDEV_INTERFACE, nss_wifi_ext_vdev_handler, NULL);
 	nss_wifi_ext_vdev_stats_dentry_create();
 }
	/*
	**************************************************************************
	* Copyright (c) 2020, 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 "nss_tx_rx_common.h"
	#include "nss_wifi_ext_vdev_stats.h"
	#include "nss_wifi_ext_vdev_log.h"

	#define NSS_WIFI_EXT_VDEV_TX_TIMEOUT 3000 /* 3 seconds */

	/*
	* Private data structure
	*/
	static struct nss_wifi_ext_vdev_pvt {
	struct semaphore sem;
	struct completion complete;
	int response;
	void *cb;
	void *app_data;
	} wifi_ext_vdev_pvt;

	/*
	* nss_wifi_ext_vdev_verify_if_num()
	* Verify if_num passed to us.
	*/
	static bool nss_wifi_ext_vdev_verify_if_num(uint32_t if_num)
	{
	uint32_t type = nss_dynamic_interface_get_type(nss_wifi_ext_vdev_get_ctx(), if_num);

	switch (type) {
	case NSS_DYNAMIC_INTERFACE_TYPE_WIFI_EXT_VDEV_WDS:
	case NSS_DYNAMIC_INTERFACE_TYPE_WIFI_EXT_VDEV_VLAN:
	return true;
	default:
	return false;
	}
	}

	/*
	* nss_wifi_ext_vdev_handler()
	* Handle NSS -> HLOS messages for wifi_ext_vdev
	*/
	static void nss_wifi_ext_vdev_handler(struct nss_ctx_instance nss_ctx, struct nss_cmn_msg ncm, void *app_data)
	{
	struct nss_wifi_ext_vdev_msg nwevm = (struct nss_wifi_ext_vdev_msg )ncm;
	void *ctx;

	nss_wifi_ext_vdev_msg_callback_t cb;

	NSS_VERIFY_CTX_MAGIC(nss_ctx);
	BUG_ON(!nss_wifi_ext_vdev_verify_if_num(ncm->interface));

	/*
	* Trace Messages
	*/
	nss_wifi_ext_vdev_log_rx_msg(nwevm);

	/*
	* Is this a valid request/response packet?
	*/
	if (ncm->type >= NSS_WIFI_EXT_VDEV_MSG_MAX) {
	nss_warning("%px: received invalid message %d for WiFi extended VAP interface %d", nss_ctx, ncm->type, ncm->interface);
	return;
	}

	if (nss_cmn_get_msg_len(ncm) > sizeof(struct nss_wifi_ext_vdev_msg)) {
	nss_warning("%px: wifi_ext_vdev message length is invalid: %d", nss_ctx, ncm->len);
	return;
	}

	/*
	* Check messages
	*/
	switch (nwevm->cm.type) {
	case NSS_WIFI_EXT_VDEV_MSG_STATS_SYNC:
	nss_wifi_ext_vdev_stats_sync(nss_ctx, &nwevm->msg.stats, ncm->interface);
	break;
	}

	/*
	* Update the callback and app_data for NOTIFY messages
	*/
	if (ncm->response == NSS_CMN_RESPONSE_NOTIFY) {
	ncm->cb = (nss_ptr_t)nss_core_get_msg_handler(nss_ctx, ncm->interface);
	ncm->app_data = (nss_ptr_t)nss_ctx->subsys_dp_register[ncm->interface].app_data;
	}

	nss_core_log_msg_failures(nss_ctx, ncm);

	/*
	* callback
	*/
	cb = (nss_wifi_ext_vdev_msg_callback_t)ncm->cb;
	ctx = (void *)ncm->app_data;

	/*
	* call the callback
	*/
	if (!cb) {
	return;
	}

	cb(ctx, ncm);
	}

	/*
	* nss_wifi_ext_vdev_msg_init()
	* Initialize wifi message.
	*/
	void nss_wifi_ext_vdev_msg_init(struct nss_wifi_ext_vdev_msg *nim, uint32_t if_num,
	uint32_t type, uint32_t len,
	nss_wifi_ext_vdev_msg_callback_t cb, void *app_data)
	{
	nss_cmn_msg_init(&nim->cm, if_num, type, len, cb, app_data);
	}
	EXPORT_SYMBOL(nss_wifi_ext_vdev_msg_init);

	/*
	* nss_wifi_ext_vdev_tx_msg()
	* Transmit a wifi vdev message to NSSFW
	*/
	nss_tx_status_t nss_wifi_ext_vdev_tx_msg(struct nss_ctx_instance nss_ctx, struct nss_wifi_ext_vdev_msg msg)
	{
	struct nss_cmn_msg *ncm = &msg->cm;

	/*
	* Trace Messages
	*/
	nss_wifi_ext_vdev_log_tx_msg(msg);

	if (ncm->type >= NSS_WIFI_EXT_VDEV_MSG_MAX) {
	nss_warning("%px: wifi vdev message type out of range: %d", nss_ctx, ncm->type);
	return NSS_TX_FAILURE;
	}

	BUG_ON(!nss_wifi_ext_vdev_verify_if_num(ncm->interface));

	return nss_core_send_cmd(nss_ctx, msg, sizeof(*msg), NSS_NBUF_PAYLOAD_SIZE);
	}
	EXPORT_SYMBOL(nss_wifi_ext_vdev_tx_msg);

	/*
	* nss_wifi_ext_vdev_callback()
	* Callback to handle the completion of NSS->HLOS messages.
	*/
	static void nss_wifi_ext_vdev_callback(void app_data, struct nss_cmn_msg ncm)
	{
	nss_wifi_ext_vdev_msg_callback_t callback = (nss_wifi_ext_vdev_msg_callback_t)wifi_ext_vdev_pvt.cb;
	void *data = wifi_ext_vdev_pvt.app_data;

	wifi_ext_vdev_pvt.response = NSS_TX_SUCCESS;
	wifi_ext_vdev_pvt.cb = NULL;
	wifi_ext_vdev_pvt.app_data = NULL;

	if (ncm->response != NSS_CMN_RESPONSE_ACK) {
	nss_warning("WiFi extension vap Error response %d\n", ncm->response);
	wifi_ext_vdev_pvt.response = NSS_TX_FAILURE;
	}

	if (callback) {
	callback(data, ncm);
	}
	complete(&wifi_ext_vdev_pvt.complete);
	}

	/*
	* nss_wifi_ext_vdev_tx_msg()
	* Transmit a WiFi extended virtual interface to NSS firmware synchronously.
	*/
	nss_tx_status_t nss_wifi_ext_vdev_tx_msg_sync(struct nss_ctx_instance nss_ctx, struct nss_wifi_ext_vdev_msg nwevm)
	{
	nss_tx_status_t status;
	int ret = 0;

	down(&wifi_ext_vdev_pvt.sem);
	wifi_ext_vdev_pvt.cb = (void *)nwevm->cm.cb;
	wifi_ext_vdev_pvt.app_data = (void *)nwevm->cm.app_data;

	nwevm->cm.cb = (nss_ptr_t)nss_wifi_ext_vdev_callback;
	nwevm->cm.app_data = (nss_ptr_t)NULL;

	status = nss_wifi_ext_vdev_tx_msg(nss_ctx, nwevm);
	if (status != NSS_TX_SUCCESS) {
	nss_warning("%px: wifi_ext_vdev_tx_msg failed\n", nss_ctx);
	up(&wifi_ext_vdev_pvt.sem);
	return status;
	}

	/*
	* Wait for the acknowledgement
	*/
	ret = wait_for_completion_timeout(&wifi_ext_vdev_pvt.complete, msecs_to_jiffies(NSS_WIFI_EXT_VDEV_TX_TIMEOUT));
	if (!ret) {
	nss_warning("%px: WiFi extended vap msg tx failed due to timeout\n", nss_ctx);
	wifi_ext_vdev_pvt.response = NSS_TX_FAILURE;
	}

	status = wifi_ext_vdev_pvt.response;
	up(&wifi_ext_vdev_pvt.sem);
	return status;
	}
	EXPORT_SYMBOL(nss_wifi_ext_vdev_tx_msg_sync);

	/*
	* nss_wifi_ext_vdev_tx_buf
	* Send data packet for vap processing
	*/
	nss_tx_status_t nss_wifi_ext_vdev_tx_buf(struct nss_ctx_instance nss_ctx, struct sk_buff skb, uint32_t if_num)
	{
	BUG_ON(!nss_wifi_ext_vdev_verify_if_num(if_num));

	return nss_core_send_packet(nss_ctx, skb, if_num, H2N_BIT_FLAG_BUFFER_REUSABLE);
	}
	EXPORT_SYMBOL(nss_wifi_ext_vdev_tx_buf);

	/*
	* nss_wifi_ext_vdev_set_next_hop()
	* Set the WiFI extended vap next hop.
	*/
	nss_tx_status_t nss_wifi_ext_vdev_set_next_hop(struct nss_ctx_instance *ctx, int if_num, int next_hop)
	{
	struct nss_wifi_ext_vdev_msg *nwevm = kzalloc(sizeof(struct nss_wifi_ext_vdev_msg), GFP_KERNEL);
	struct nss_wifi_ext_vdev_set_next_hop_msg *nhm = NULL;
	nss_tx_status_t status;

	if (!nwevm) {
	nss_warning("%px: Unable to allocate next hop message", ctx);
	return NSS_TX_FAILURE;
	}

	nhm = &nwevm->msg.wnhm;

	nhm->if_num = next_hop;
	nss_wifi_ext_vdev_msg_init(nwevm, if_num, NSS_WIFI_EXT_VDEV_SET_NEXT_HOP,
	sizeof(struct nss_wifi_ext_vdev_set_next_hop_msg), NULL, NULL);

	status = nss_wifi_ext_vdev_tx_msg(ctx, nwevm);
	if (status != NSS_TX_SUCCESS) {
	nss_warning("%px: Unable to send next hop message", ctx);
	}

	kfree(nwevm);
	return status;
	}
	EXPORT_SYMBOL(nss_wifi_ext_vdev_set_next_hop);

	/*
	* nss_get_wifi_ext_vdev_ext_context()
	* Return the core ctx which the feature is on
	*/
	struct nss_ctx_instance *nss_wifi_ext_vdev_get_ctx(void)
	{
	return (struct nss_ctx_instance *)&nss_top_main.nss[nss_top_main.wifi_handler_id];
	}
	EXPORT_SYMBOL(nss_wifi_ext_vdev_get_ctx);

	/*
	* nss_wifi_ext_vdev_register_if()
	*/
	struct nss_ctx_instance *nss_wifi_ext_vdev_register_if(uint32_t if_num,
	nss_wifi_ext_vdev_data_callback_t data_callback,
	nss_wifi_ext_vdev_ext_data_callback_t ext_callback,
	nss_wifi_ext_vdev_msg_callback_t event_callback,
	struct net_device *netdev,
	uint32_t features, void *app_data)
	{
	struct nss_ctx_instance *nss_ctx = nss_wifi_ext_vdev_get_ctx();

	BUG_ON(!nss_wifi_ext_vdev_verify_if_num(if_num));

	nss_core_register_subsys_dp(nss_ctx, if_num, data_callback, ext_callback, app_data, netdev, features);

	nss_core_register_msg_handler(nss_ctx, if_num, event_callback);

	nss_core_register_handler(nss_ctx, if_num, nss_wifi_ext_vdev_handler, app_data);

	nss_wifi_ext_vdev_stats_register(if_num, netdev);

	return nss_ctx;
	}
	EXPORT_SYMBOL(nss_wifi_ext_vdev_register_if);

	/*
	* nss_wifi_ext_vdev_unregister_if()
	*/
	bool nss_wifi_ext_vdev_unregister_if(uint32_t if_num)
	{
	struct nss_ctx_instance *nss_ctx = nss_wifi_ext_vdev_get_ctx();
	struct net_device *netdev;

	BUG_ON(!nss_wifi_ext_vdev_verify_if_num(if_num));

	nss_assert(nss_ctx);

	netdev = nss_cmn_get_interface_dev(nss_ctx, if_num);
	if (!netdev) {
	nss_warning("%px: Unable to find net device for the interface %d\n", nss_ctx, if_num);
	return false;
	}
	nss_core_unregister_subsys_dp(nss_ctx, if_num);

	nss_core_unregister_msg_handler(nss_ctx, if_num);

	nss_core_unregister_handler(nss_ctx, if_num);

	nss_wifi_ext_vdev_stats_unregister(if_num, netdev);
	return true;
	}
	EXPORT_SYMBOL(nss_wifi_ext_vdev_unregister_if);

	/*
	* nss_wifi_ext_vdev_register_handler()
	* Register debugfs handler received on base interface
	*/
	void nss_wifi_ext_vdev_register_handler(void)
	{
	struct nss_ctx_instance *nss_ctx = nss_wifi_ext_vdev_get_ctx();

	nss_info("nss_wifi_ext_vdev_handler");
	sema_init(&wifi_ext_vdev_pvt.sem, 1);
	init_completion(&wifi_ext_vdev_pvt.complete);
	nss_core_register_handler(nss_ctx, NSS_WIFI_EXT_VDEV_INTERFACE, nss_wifi_ext_vdev_handler, NULL);
	nss_wifi_ext_vdev_stats_dentry_create();
	}