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

 /*
  **************************************************************************
  * Copyright (c) 2016-2018, 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_trustsec_tx_stats.h"
 #include "nss_trustsec_tx_log.h"

 #define NSS_TRUSTSEC_TX_TIMEOUT 3000 /* 3 Seconds */

 /*
  * Private data structure for trustsec_tx interface
  */
 static struct nss_trustsec_tx_pvt {
 	struct semaphore sem;
 	struct completion complete;
 	int response;
 } ttx;

 /*
  * nss_trustsec_tx_handler()
  *	Handle NSS -> HLOS messages for trustsec_tx
  */
 static void nss_trustsec_tx_handler(struct nss_ctx_instance *nss_ctx, struct nss_cmn_msg *ncm,
 				__attribute__((unused))void *app_data)
 {
 	nss_trustsec_tx_msg_callback_t cb;
 	struct nss_trustsec_tx_msg *npm = (struct nss_trustsec_tx_msg *)ncm;

 	BUG_ON(ncm->interface != NSS_TRUSTSEC_TX_INTERFACE);

 	/*
 	 * Trace messages.
 	 */
 	nss_trustsec_tx_log_rx_msg(npm);

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

 	if (nss_cmn_get_msg_len(ncm) > sizeof(struct nss_trustsec_tx_msg)) {
 		nss_warning("%px: message size incorrect: %d", nss_ctx, nss_cmn_get_msg_len(ncm));
 		return;
 	}

 	/*
 	 * Log failures
 	 */
 	nss_core_log_msg_failures(nss_ctx, ncm);

 	switch (ncm->type) {
 	case NSS_TRUSTSEC_TX_MSG_STATS_SYNC:
 		/*
 		 * Update trustsec_tx statistics.
 		 */
 		nss_trustsec_tx_stats_sync(nss_ctx, &npm->msg.stats_sync);
 		break;
 	}

 	/*
 	 * Update the callback and app_data for NOTIFY messages, trustsec_tx sends all notify messages
 	 * to the same callback/app_data.
 	 */
 	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].ndev;
 	}

 	/*
 	 * Do we have a call back
 	 */
 	if (!ncm->cb) {
 		return;
 	}

 	/*
 	 * callback
 	 */
 	cb = (nss_trustsec_tx_msg_callback_t)ncm->cb;

 	cb((void *)ncm->app_data, npm);
 }

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

 	/*
 	 * Trace messages.
 	 */
 	nss_trustsec_tx_log_tx_msg(msg);

 	/*
 	 * Sanity check the message
 	 */
 	if (ncm->interface != NSS_TRUSTSEC_TX_INTERFACE) {
 		nss_warning("%px: tx request for another interface: %d", nss_ctx, ncm->interface);
 		return NSS_TX_FAILURE;
 	}

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

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

 /*
  * nss_trustsec_tx_callback
  *	Callback to handle the completion of NSS ->HLOS messages.
  */
 static void nss_trustsec_tx_callback(void *app_data, struct nss_trustsec_tx_msg *npm)
 {
 	if (npm->cm.response != NSS_CMN_RESPONSE_ACK) {
 		nss_warning("trustsec_tx error response %d\n", npm->cm.response);
 		ttx.response = NSS_TX_FAILURE;
 		complete(&ttx.complete);
 		return;
 	}

 	ttx.response = NSS_TX_SUCCESS;
 	complete(&ttx.complete);
 }

 /*
  * nss_trustsec_tx_msg_sync()
  *	Send a message to trustsec_tx interface & wait for the response.
  */
 nss_tx_status_t nss_trustsec_tx_msg_sync(struct nss_ctx_instance *nss_ctx, struct nss_trustsec_tx_msg *msg)
 {
 	nss_tx_status_t status;
 	int ret = 0;

 	down(&ttx.sem);

 	msg->cm.cb = (nss_ptr_t)nss_trustsec_tx_callback;
 	msg->cm.app_data = (nss_ptr_t)NULL;

 	status = nss_trustsec_tx_msg(nss_ctx, msg);
 	if (status != NSS_TX_SUCCESS) {
 		nss_warning("%px: nss_trustsec_tx_msg failed\n", nss_ctx);
 		up(&ttx.sem);
 		return status;
 	}

 	ret = wait_for_completion_timeout(&ttx.complete, msecs_to_jiffies(NSS_TRUSTSEC_TX_TIMEOUT));
 	if (!ret) {
 		nss_warning("%px: trustsec_tx tx failed due to timeout\n", nss_ctx);
 		ttx.response = NSS_TX_FAILURE;
 	}

 	status = ttx.response;
 	up(&ttx.sem);

 	return status;
 }
 EXPORT_SYMBOL(nss_trustsec_tx_msg_sync);

 /*
  * nss_trustsec_tx_get_ctx()
  *	Return a TrustSec TX NSS context.
  */
 struct nss_ctx_instance *nss_trustsec_tx_get_ctx()
 {
 	return &nss_top_main.nss[nss_top_main.trustsec_tx_handler_id];
 }
 EXPORT_SYMBOL(nss_trustsec_tx_get_ctx);

 /*
  * nss_trustsec_tx_msg_init()
  *	Initialize trustsec_tx message.
  */
 void nss_trustsec_tx_msg_init(struct nss_trustsec_tx_msg *npm, uint16_t if_num, uint32_t type, uint32_t len,
 				nss_trustsec_tx_msg_callback_t cb, void *app_data)
 {
 	nss_cmn_msg_init(&npm->cm, if_num, type, len, (void *)cb, app_data);
 }
 EXPORT_SYMBOL(nss_trustsec_tx_msg_init);

 /*
  * nss_trustsec_tx_update_nexthop()
  */
 nss_tx_status_t nss_trustsec_tx_update_nexthop(uint32_t src, uint32_t dest, uint16_t sgt)
 {
 	struct nss_ctx_instance *ctx = nss_trustsec_tx_get_ctx();
 	struct nss_trustsec_tx_msg ttx_msg = {{0}};
 	struct nss_trustsec_tx_update_nexthop_msg *ttxunh;
 	nss_tx_status_t status;

 	ttxunh = &ttx_msg.msg.upd_nexthop;
 	ttxunh->src = src;
 	ttxunh->dest = dest;
 	ttxunh->sgt = sgt;

 	nss_trustsec_tx_msg_init(&ttx_msg, NSS_TRUSTSEC_TX_INTERFACE, NSS_TRUSTSEC_TX_MSG_UPDATE_NEXTHOP,
 			sizeof(*ttxunh), NULL, NULL);

 	BUG_ON(in_atomic());
 	status = nss_trustsec_tx_msg_sync(ctx, &ttx_msg);
 	if (status != NSS_TX_SUCCESS) {
 		nss_warning("%px: configure trustsec_tx failed: %d\n", ctx, status);
 	}

 	return status;
 }
 EXPORT_SYMBOL(nss_trustsec_tx_update_nexthop);

 /*
  * nss_trustsec_tx_configure_sgt()
  */
 nss_tx_status_t nss_trustsec_tx_configure_sgt(uint32_t src, uint32_t dest, uint16_t sgt)
 {
 	struct nss_ctx_instance *ctx = nss_trustsec_tx_get_ctx();
 	struct nss_trustsec_tx_msg ttx_msg = {{0}};
 	struct nss_trustsec_tx_configure_msg *ttxcfg;
 	nss_tx_status_t status;

 	ttxcfg = &ttx_msg.msg.configure;
 	ttxcfg->src = src;
 	ttxcfg->dest = dest;
 	ttxcfg->sgt = sgt;

 	nss_trustsec_tx_msg_init(&ttx_msg, NSS_TRUSTSEC_TX_INTERFACE, NSS_TRUSTSEC_TX_MSG_CONFIGURE,
 			sizeof(*ttxcfg), NULL, NULL);

 	BUG_ON(in_atomic());
 	status = nss_trustsec_tx_msg_sync(ctx, &ttx_msg);
 	if (status != NSS_TX_SUCCESS) {
 		nss_warning("%px: configure trustsec_tx failed: %d\n", ctx, status);
 	}

 	return status;
 }
 EXPORT_SYMBOL(nss_trustsec_tx_configure_sgt);

 /*
  * nss_trustsec_tx_unconfigure()
  */
 nss_tx_status_t nss_trustsec_tx_unconfigure_sgt(uint32_t src, uint16_t sgt)
 {
 	struct nss_ctx_instance *ctx = nss_trustsec_tx_get_ctx();
 	struct nss_trustsec_tx_msg ttx_msg = {{0}};
 	struct nss_trustsec_tx_unconfigure_msg *ttxucfg;
 	nss_tx_status_t status;

 	ttxucfg = &ttx_msg.msg.unconfigure;
 	ttxucfg->src = src;
 	ttxucfg->sgt = sgt;

 	nss_trustsec_tx_msg_init(&ttx_msg, NSS_TRUSTSEC_TX_INTERFACE, NSS_TRUSTSEC_TX_MSG_UNCONFIGURE,
 			sizeof(*ttxucfg), NULL, NULL);

 	BUG_ON(in_atomic());
 	status = nss_trustsec_tx_msg_sync(ctx, &ttx_msg);
 	if (status != NSS_TX_SUCCESS) {
 		nss_warning("%px: unconfigure trustsec_tx failed: %d\n", ctx, status);
 	}

 	return status;
 }
 EXPORT_SYMBOL(nss_trustsec_tx_unconfigure_sgt);

 /*
  * nss_trustsec_tx_register_handler()
  *	Registering handler for sending msg to trustsec_tx node on NSS.
  */
 void nss_trustsec_tx_register_handler(void)
 {
 	struct nss_ctx_instance *nss_ctx = nss_trustsec_tx_get_ctx();

 	nss_core_register_handler(nss_ctx, NSS_TRUSTSEC_TX_INTERFACE, nss_trustsec_tx_handler, NULL);

 	nss_trustsec_tx_stats_dentry_create();

 	sema_init(&ttx.sem, 1);
 	init_completion(&ttx.complete);
 }
	/*
	**************************************************************************
	* Copyright (c) 2016-2018, 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_trustsec_tx_stats.h"
	#include "nss_trustsec_tx_log.h"

	#define NSS_TRUSTSEC_TX_TIMEOUT 3000 /* 3 Seconds */

	/*
	* Private data structure for trustsec_tx interface
	*/
	static struct nss_trustsec_tx_pvt {
	struct semaphore sem;
	struct completion complete;
	int response;
	} ttx;

	/*
	* nss_trustsec_tx_handler()
	* Handle NSS -> HLOS messages for trustsec_tx
	*/
	static void nss_trustsec_tx_handler(struct nss_ctx_instance nss_ctx, struct nss_cmn_msg ncm,
	__attribute__((unused))void *app_data)
	{
	nss_trustsec_tx_msg_callback_t cb;
	struct nss_trustsec_tx_msg npm = (struct nss_trustsec_tx_msg )ncm;

	BUG_ON(ncm->interface != NSS_TRUSTSEC_TX_INTERFACE);

	/*
	* Trace messages.
	*/
	nss_trustsec_tx_log_rx_msg(npm);

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

	if (nss_cmn_get_msg_len(ncm) > sizeof(struct nss_trustsec_tx_msg)) {
	nss_warning("%px: message size incorrect: %d", nss_ctx, nss_cmn_get_msg_len(ncm));
	return;
	}

	/*
	* Log failures
	*/
	nss_core_log_msg_failures(nss_ctx, ncm);

	switch (ncm->type) {
	case NSS_TRUSTSEC_TX_MSG_STATS_SYNC:
	/*
	* Update trustsec_tx statistics.
	*/
	nss_trustsec_tx_stats_sync(nss_ctx, &npm->msg.stats_sync);
	break;
	}

	/*
	* Update the callback and app_data for NOTIFY messages, trustsec_tx sends all notify messages
	* to the same callback/app_data.
	*/
	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].ndev;
	}

	/*
	* Do we have a call back
	*/
	if (!ncm->cb) {
	return;
	}

	/*
	* callback
	*/
	cb = (nss_trustsec_tx_msg_callback_t)ncm->cb;

	cb((void *)ncm->app_data, npm);
	}

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

	/*
	* Trace messages.
	*/
	nss_trustsec_tx_log_tx_msg(msg);

	/*
	* Sanity check the message
	*/
	if (ncm->interface != NSS_TRUSTSEC_TX_INTERFACE) {
	nss_warning("%px: tx request for another interface: %d", nss_ctx, ncm->interface);
	return NSS_TX_FAILURE;
	}

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

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

	/*
	* nss_trustsec_tx_callback
	* Callback to handle the completion of NSS ->HLOS messages.
	*/
	static void nss_trustsec_tx_callback(void app_data, struct nss_trustsec_tx_msg npm)
	{
	if (npm->cm.response != NSS_CMN_RESPONSE_ACK) {
	nss_warning("trustsec_tx error response %d\n", npm->cm.response);
	ttx.response = NSS_TX_FAILURE;
	complete(&ttx.complete);
	return;
	}

	ttx.response = NSS_TX_SUCCESS;
	complete(&ttx.complete);
	}

	/*
	* nss_trustsec_tx_msg_sync()
	* Send a message to trustsec_tx interface & wait for the response.
	*/
	nss_tx_status_t nss_trustsec_tx_msg_sync(struct nss_ctx_instance nss_ctx, struct nss_trustsec_tx_msg msg)
	{
	nss_tx_status_t status;
	int ret = 0;

	down(&ttx.sem);

	msg->cm.cb = (nss_ptr_t)nss_trustsec_tx_callback;
	msg->cm.app_data = (nss_ptr_t)NULL;

	status = nss_trustsec_tx_msg(nss_ctx, msg);
	if (status != NSS_TX_SUCCESS) {
	nss_warning("%px: nss_trustsec_tx_msg failed\n", nss_ctx);
	up(&ttx.sem);
	return status;
	}

	ret = wait_for_completion_timeout(&ttx.complete, msecs_to_jiffies(NSS_TRUSTSEC_TX_TIMEOUT));
	if (!ret) {
	nss_warning("%px: trustsec_tx tx failed due to timeout\n", nss_ctx);
	ttx.response = NSS_TX_FAILURE;
	}

	status = ttx.response;
	up(&ttx.sem);

	return status;
	}
	EXPORT_SYMBOL(nss_trustsec_tx_msg_sync);

	/*
	* nss_trustsec_tx_get_ctx()
	* Return a TrustSec TX NSS context.
	*/
	struct nss_ctx_instance *nss_trustsec_tx_get_ctx()
	{
	return &nss_top_main.nss[nss_top_main.trustsec_tx_handler_id];
	}
	EXPORT_SYMBOL(nss_trustsec_tx_get_ctx);

	/*
	* nss_trustsec_tx_msg_init()
	* Initialize trustsec_tx message.
	*/
	void nss_trustsec_tx_msg_init(struct nss_trustsec_tx_msg *npm, uint16_t if_num, uint32_t type, uint32_t len,
	nss_trustsec_tx_msg_callback_t cb, void *app_data)
	{
	nss_cmn_msg_init(&npm->cm, if_num, type, len, (void *)cb, app_data);
	}
	EXPORT_SYMBOL(nss_trustsec_tx_msg_init);

	/*
	* nss_trustsec_tx_update_nexthop()
	*/
	nss_tx_status_t nss_trustsec_tx_update_nexthop(uint32_t src, uint32_t dest, uint16_t sgt)
	{
	struct nss_ctx_instance *ctx = nss_trustsec_tx_get_ctx();
	struct nss_trustsec_tx_msg ttx_msg = {{0}};
	struct nss_trustsec_tx_update_nexthop_msg *ttxunh;
	nss_tx_status_t status;

	ttxunh = &ttx_msg.msg.upd_nexthop;
	ttxunh->src = src;
	ttxunh->dest = dest;
	ttxunh->sgt = sgt;

	nss_trustsec_tx_msg_init(&ttx_msg, NSS_TRUSTSEC_TX_INTERFACE, NSS_TRUSTSEC_TX_MSG_UPDATE_NEXTHOP,
	sizeof(*ttxunh), NULL, NULL);

	BUG_ON(in_atomic());
	status = nss_trustsec_tx_msg_sync(ctx, &ttx_msg);
	if (status != NSS_TX_SUCCESS) {
	nss_warning("%px: configure trustsec_tx failed: %d\n", ctx, status);
	}

	return status;
	}
	EXPORT_SYMBOL(nss_trustsec_tx_update_nexthop);

	/*
	* nss_trustsec_tx_configure_sgt()
	*/
	nss_tx_status_t nss_trustsec_tx_configure_sgt(uint32_t src, uint32_t dest, uint16_t sgt)
	{
	struct nss_ctx_instance *ctx = nss_trustsec_tx_get_ctx();
	struct nss_trustsec_tx_msg ttx_msg = {{0}};
	struct nss_trustsec_tx_configure_msg *ttxcfg;
	nss_tx_status_t status;

	ttxcfg = &ttx_msg.msg.configure;
	ttxcfg->src = src;
	ttxcfg->dest = dest;
	ttxcfg->sgt = sgt;

	nss_trustsec_tx_msg_init(&ttx_msg, NSS_TRUSTSEC_TX_INTERFACE, NSS_TRUSTSEC_TX_MSG_CONFIGURE,
	sizeof(*ttxcfg), NULL, NULL);

	BUG_ON(in_atomic());
	status = nss_trustsec_tx_msg_sync(ctx, &ttx_msg);
	if (status != NSS_TX_SUCCESS) {
	nss_warning("%px: configure trustsec_tx failed: %d\n", ctx, status);
	}

	return status;
	}
	EXPORT_SYMBOL(nss_trustsec_tx_configure_sgt);

	/*
	* nss_trustsec_tx_unconfigure()
	*/
	nss_tx_status_t nss_trustsec_tx_unconfigure_sgt(uint32_t src, uint16_t sgt)
	{
	struct nss_ctx_instance *ctx = nss_trustsec_tx_get_ctx();
	struct nss_trustsec_tx_msg ttx_msg = {{0}};
	struct nss_trustsec_tx_unconfigure_msg *ttxucfg;
	nss_tx_status_t status;

	ttxucfg = &ttx_msg.msg.unconfigure;
	ttxucfg->src = src;
	ttxucfg->sgt = sgt;

	nss_trustsec_tx_msg_init(&ttx_msg, NSS_TRUSTSEC_TX_INTERFACE, NSS_TRUSTSEC_TX_MSG_UNCONFIGURE,
	sizeof(*ttxucfg), NULL, NULL);

	BUG_ON(in_atomic());
	status = nss_trustsec_tx_msg_sync(ctx, &ttx_msg);
	if (status != NSS_TX_SUCCESS) {
	nss_warning("%px: unconfigure trustsec_tx failed: %d\n", ctx, status);
	}

	return status;
	}
	EXPORT_SYMBOL(nss_trustsec_tx_unconfigure_sgt);

	/*
	* nss_trustsec_tx_register_handler()
	* Registering handler for sending msg to trustsec_tx node on NSS.
	*/
	void nss_trustsec_tx_register_handler(void)
	{
	struct nss_ctx_instance *nss_ctx = nss_trustsec_tx_get_ctx();

	nss_core_register_handler(nss_ctx, NSS_TRUSTSEC_TX_INTERFACE, nss_trustsec_tx_handler, NULL);

	nss_trustsec_tx_stats_dentry_create();

	sema_init(&ttx.sem, 1);
	init_completion(&ttx.complete);
	}