blob: 29591a90881fe6ec053eaee68a569aa5d6855319 [file] [log] [blame]
/*
**************************************************************************
* Copyright (c) 2013 - 2015, 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.
**************************************************************************
*/
/*
* nss_ipsec.c
* NSS IPsec APIs
*/
#include "nss_tx_rx_common.h"
#include "nss_ipsec.h"
/*
**********************************
General APIs
**********************************
*/
#define nss_ipsec_warning(fmt, arg...) nss_warning("IPsec:"fmt, ##arg)
#define nss_ipsec_info(fmt, arg...) nss_info("IPsec:"fmt, ##arg)
#define nss_ipsec_trace(fmt, arg...) nss_trace("IPsec:"fmt, ##arg)
/*
* nss_ipsec_set_msg_callback()
* this sets the message callback handler and its associated context
*/
static inline nss_tx_status_t nss_ipsec_set_msg_callback(struct nss_ctx_instance *nss_ctx, uint32_t if_num,
nss_ipsec_msg_callback_t cb, void *ipsec_ctx)
{
struct nss_top_instance *nss_top;
nss_top = nss_ctx->nss_top;
switch (if_num) {
case NSS_IPSEC_ENCAP_IF_NUMBER:
nss_top->ipsec_encap_ctx = ipsec_ctx;
nss_top->ipsec_encap_callback = cb;
break;
case NSS_IPSEC_DECAP_IF_NUMBER:
nss_top->ipsec_decap_ctx = ipsec_ctx;
nss_top->ipsec_decap_callback = cb;
break;
default:
nss_ipsec_warning("%p: cannot 'set' message callback, incorrect I/F: %d", nss_ctx, if_num);
return NSS_TX_FAILURE;
}
return NSS_TX_SUCCESS;
}
/*
* nss_ipsec_get_msg_callback()
* this gets the message callback handler and its associated context
*/
static inline nss_ipsec_msg_callback_t nss_ipsec_get_msg_callback(struct nss_ctx_instance *nss_ctx, uint32_t if_num, void **ipsec_ctx)
{
struct nss_top_instance *nss_top;
nss_top = nss_ctx->nss_top;
switch (if_num) {
case NSS_IPSEC_ENCAP_IF_NUMBER:
*ipsec_ctx = nss_top->ipsec_encap_ctx;
return nss_top->ipsec_encap_callback;
case NSS_IPSEC_DECAP_IF_NUMBER:
*ipsec_ctx = nss_top->ipsec_decap_ctx;
return nss_top->ipsec_decap_callback;
default:
*ipsec_ctx = NULL;
nss_ipsec_warning("%p: cannot 'get' message callback, incorrect I/F: %d", nss_ctx, if_num);
return NULL;
}
}
/*
**********************************
Rx APIs
**********************************
*/
/*
* nss_ipsec_msg_handler()
* this handles all the IPsec events and responses
*/
static void nss_ipsec_msg_handler(struct nss_ctx_instance *nss_ctx, struct nss_cmn_msg *ncm, void *app_data __attribute((unused)))
{
struct nss_ipsec_msg *nim = (struct nss_ipsec_msg *)ncm;
nss_ipsec_msg_callback_t cb = NULL;
uint32_t if_num = ncm->interface;
void *ipsec_ctx;
/*
* Sanity check the message type
*/
if (ncm->type > NSS_IPSEC_MSG_TYPE_MAX) {
nss_ipsec_warning("%p: rx message type out of range: %d", nss_ctx, ncm->type);
return;
}
if (ncm->len > sizeof(struct nss_ipsec_msg)) {
nss_ipsec_warning("%p: rx request for another interface: %d", nss_ctx, ncm->interface);
return;
}
if ((ncm->interface != NSS_IPSEC_ENCAP_IF_NUMBER) && (ncm->interface != NSS_IPSEC_DECAP_IF_NUMBER)) {
nss_ipsec_warning("%p: rx message request for another interface: %d", nss_ctx, ncm->interface);
return;
}
if (ncm->response == NSS_CMN_RESPONSE_LAST) {
nss_ipsec_warning("%p: rx message response for if %d, type %d, is invalid: %d", nss_ctx, ncm->interface,
ncm->type, ncm->response);
return;
}
/*
* Is this a notification? if, yes then fill up the callback and app_data from
* locally stored state
*/
if (ncm->response == NSS_CMM_RESPONSE_NOTIFY) {
ncm->cb = (uint32_t)nss_ipsec_get_msg_callback(nss_ctx, if_num, &ipsec_ctx);
ncm->app_data = (uint32_t)ipsec_ctx;
}
nss_core_log_msg_failures(nss_ctx, ncm);
/*
* load, test & call
*/
cb = (nss_ipsec_msg_callback_t)ncm->cb;
if (unlikely(!cb)) {
nss_ipsec_trace("%p: rx handler has been unregistered for i/f: %d", nss_ctx, ncm->interface);
return;
}
cb((void *)ncm->app_data, nim);
}
/*
**********************************
Tx APIs
**********************************
*/
/*
* nss_ipsec_tx_msg
* Send ipsec rule to NSS.
*/
nss_tx_status_t nss_ipsec_tx_msg(struct nss_ctx_instance *nss_ctx, struct nss_ipsec_msg *msg)
{
struct nss_cmn_msg *ncm = &msg->cm;
struct nss_ipsec_msg *nim;
struct sk_buff *nbuf;
int32_t status;
nss_ipsec_info("%p: message %d for if %d\n", nss_ctx, ncm->type, ncm->interface);
NSS_VERIFY_CTX_MAGIC(nss_ctx);
if (unlikely(nss_ctx->state != NSS_CORE_STATE_INITIALIZED)) {
nss_ipsec_warning("%p: tx message dropped as core not ready", nss_ctx);
return NSS_TX_FAILURE_NOT_READY;
}
if (NSS_NBUF_PAYLOAD_SIZE < sizeof(struct nss_ipsec_msg)) {
nss_ipsec_warning("%p: tx message request is too large: %d (desired), %d (requested)", nss_ctx,
NSS_NBUF_PAYLOAD_SIZE, sizeof(struct nss_ipsec_msg));
return NSS_TX_FAILURE_TOO_LARGE;
}
if ((ncm->interface != NSS_IPSEC_ENCAP_IF_NUMBER) && (ncm->interface != NSS_IPSEC_DECAP_IF_NUMBER)) {
nss_ipsec_warning("%p: tx message request for another interface: %d", nss_ctx, ncm->interface);
return NSS_TX_FAILURE;
}
if (ncm->type > NSS_IPSEC_MSG_TYPE_MAX) {
nss_ipsec_warning("%p: tx message type out of range: %d", nss_ctx, ncm->type);
return NSS_TX_FAILURE;
}
if (ncm->len > sizeof(struct nss_ipsec_msg)) {
nss_ipsec_warning("%p: tx message request len for if %d, is bad: %d", nss_ctx, ncm->interface, ncm->len);
return NSS_TX_FAILURE_BAD_PARAM;
}
nbuf = dev_alloc_skb(NSS_NBUF_PAYLOAD_SIZE);
if (unlikely(!nbuf)) {
spin_lock_bh(&nss_ctx->nss_top->stats_lock);
nss_ctx->nss_top->stats_drv[NSS_STATS_DRV_NBUF_ALLOC_FAILS]++;
spin_unlock_bh(&nss_ctx->nss_top->stats_lock);
nss_ipsec_warning("%p: tx rule dropped as command allocation failed", nss_ctx);
return NSS_TX_FAILURE;
}
nss_ipsec_info("msg params version:%d, interface:%d, type:%d, cb:%d, app_data:%d, len:%d\n",
ncm->version, ncm->interface, ncm->type, ncm->cb, ncm->app_data, ncm->len);
nim = (struct nss_ipsec_msg *)skb_put(nbuf, sizeof(struct nss_ipsec_msg));
memcpy(nim, msg, sizeof(struct nss_ipsec_msg));
status = nss_core_send_buffer(nss_ctx, 0, nbuf, NSS_IF_CMD_QUEUE, H2N_BUFFER_CTRL, 0);
if (status != NSS_CORE_STATUS_SUCCESS) {
dev_kfree_skb_any(nbuf);
nss_ipsec_warning("%p: tx Unable to enqueue message \n", nss_ctx);
return NSS_TX_FAILURE;
}
nss_hal_send_interrupt(nss_ctx->nmap, nss_ctx->h2n_desc_rings[NSS_IF_CMD_QUEUE].desc_ring.int_bit,
NSS_REGS_H2N_INTR_STATUS_DATA_COMMAND_QUEUE);
return NSS_TX_SUCCESS;
}
EXPORT_SYMBOL(nss_ipsec_tx_msg);
/*
* nss_ipsec_tx_buf
* Send data packet for ipsec processing
*/
nss_tx_status_t nss_ipsec_tx_buf(struct sk_buff *skb, uint32_t if_num)
{
int32_t status;
struct nss_ctx_instance *nss_ctx = &nss_top_main.nss[nss_top_main.ipsec_handler_id];
uint16_t int_bit = nss_ctx->h2n_desc_rings[NSS_IF_DATA_QUEUE_0].desc_ring.int_bit;
nss_trace("%p: IPsec If Tx packet, id:%d, data=%p", nss_ctx, if_num, skb->data);
NSS_VERIFY_CTX_MAGIC(nss_ctx);
if (unlikely(nss_ctx->state != NSS_CORE_STATE_INITIALIZED)) {
nss_warning("%p: 'IPsec If Tx' packet dropped as core not ready", nss_ctx);
return NSS_TX_FAILURE_NOT_READY;
}
status = nss_core_send_buffer(nss_ctx, if_num, skb, NSS_IF_DATA_QUEUE_0, H2N_BUFFER_PACKET, 0);
if (unlikely(status != NSS_CORE_STATUS_SUCCESS)) {
nss_warning("%p: Unable to enqueue 'IPsec If Tx' packet\n", nss_ctx);
if (status == NSS_CORE_STATUS_FAILURE_QUEUE) {
return NSS_TX_FAILURE_QUEUE;
}
return NSS_TX_FAILURE;
}
/*
* Kick the NSS awake so it can process our new entry.
*/
nss_hal_send_interrupt(nss_ctx->nmap, int_bit, NSS_REGS_H2N_INTR_STATUS_DATA_COMMAND_QUEUE);
NSS_PKT_STATS_INCREMENT(nss_ctx, &nss_ctx->nss_top->stats_drv[NSS_STATS_DRV_TX_PACKET]);
return NSS_TX_SUCCESS;
}
EXPORT_SYMBOL(nss_ipsec_tx_buf);
/*
**********************************
Register APIs
**********************************
*/
/*
* nss_ipsec_notify_register()
* register message notifier for the given interface (if_num)
*/
struct nss_ctx_instance *nss_ipsec_notify_register(uint32_t if_num, nss_ipsec_msg_callback_t cb, void *app_data)
{
struct nss_ctx_instance *nss_ctx;
nss_ctx = &nss_top_main.nss[nss_top_main.ipsec_handler_id];
if (if_num >= NSS_MAX_NET_INTERFACES) {
nss_ipsec_warning("%p: notfiy register received for invalid interface %d", nss_ctx, if_num);
return NULL;
}
if (nss_ipsec_set_msg_callback(nss_ctx, if_num, cb, app_data) != NSS_TX_SUCCESS) {
nss_ipsec_warning("%p: register failed\n", nss_ctx);
return NULL;
}
return nss_ctx;
}
EXPORT_SYMBOL(nss_ipsec_notify_register);
/*
* nss_ipsec_notify_unregister()
* unregister the IPsec notifier for the given interface number (if_num)
*/
void nss_ipsec_notify_unregister(struct nss_ctx_instance *nss_ctx, uint32_t if_num)
{
if (if_num >= NSS_MAX_NET_INTERFACES) {
nss_ipsec_warning("%p: notify unregister received for invalid interface %d", nss_ctx, if_num);
return;
}
if (nss_ipsec_set_msg_callback(nss_ctx, if_num, NULL, NULL) != NSS_TX_SUCCESS) {
nss_ipsec_warning("%p: unregister failed\n", nss_ctx);
return;
}
}
EXPORT_SYMBOL(nss_ipsec_notify_unregister);
/*
* nss_ipsec_data_register()
* register a data callback routine
*/
struct nss_ctx_instance *nss_ipsec_data_register(uint32_t if_num, nss_ipsec_buf_callback_t cb, struct net_device *netdev, uint32_t features)
{
struct nss_ctx_instance *nss_ctx;
nss_ctx = &nss_top_main.nss[nss_top_main.ipsec_handler_id];
if ((if_num >= NSS_MAX_NET_INTERFACES) && (if_num < NSS_MAX_PHYSICAL_INTERFACES)){
nss_ipsec_warning("%p: data register received for invalid interface %d", nss_ctx, if_num);
return NULL;
}
nss_ctx->nss_top->subsys_dp_register[if_num].cb = cb;
nss_ctx->nss_top->subsys_dp_register[if_num].app_data = NULL;
nss_ctx->nss_top->subsys_dp_register[if_num].ndev = netdev;
nss_ctx->nss_top->subsys_dp_register[if_num].features = features;
return nss_ctx;
}
EXPORT_SYMBOL(nss_ipsec_data_register);
/*
* nss_ipsec_data_unregister()
* unregister a data callback routine
*/
void nss_ipsec_data_unregister(struct nss_ctx_instance *nss_ctx, uint32_t if_num)
{
if ((if_num >= NSS_MAX_NET_INTERFACES) && (if_num < NSS_MAX_PHYSICAL_INTERFACES)){
nss_ipsec_warning("%p: data unregister received for invalid interface %d", nss_ctx, if_num);
return;
}
nss_ctx->nss_top->subsys_dp_register[if_num].cb = NULL;
nss_ctx->nss_top->subsys_dp_register[if_num].app_data = NULL;
nss_ctx->nss_top->subsys_dp_register[if_num].ndev = NULL;
nss_ctx->nss_top->subsys_dp_register[if_num].features = 0;
}
EXPORT_SYMBOL(nss_ipsec_data_unregister);
/*
* nss_ipsec_get_interface_num()
* Get the NSS interface number on which ipsec user shall register
*/
int32_t nss_ipsec_get_interface(struct nss_ctx_instance *nss_ctx)
{
/*
* Check on which core is ipsec enabled
*/
switch(nss_ctx->id) {
case 0:
return NSS_IPSEC_RULE_INTERFACE;
case 1:
return NSS_C2C_TX_INTERFACE;
}
return -1;
}
EXPORT_SYMBOL(nss_ipsec_get_interface);
/*
* nss_ipsec_get_ctx()
* get NSS context instance for IPsec handle
*/
struct nss_ctx_instance *nss_ipsec_get_context(void)
{
return &nss_top_main.nss[nss_top_main.ipsec_handler_id];
}
EXPORT_SYMBOL(nss_ipsec_get_context);
/*
* nss_ipsec_register_handler()
*/
void nss_ipsec_register_handler()
{
struct nss_ctx_instance *nss_ctx = &nss_top_main.nss[nss_top_main.ipsec_handler_id];
nss_ipsec_set_msg_callback(nss_ctx, NSS_IPSEC_ENCAP_IF_NUMBER, NULL, NULL);
nss_core_register_handler(NSS_IPSEC_ENCAP_IF_NUMBER, nss_ipsec_msg_handler, NULL);
nss_ipsec_set_msg_callback(nss_ctx, NSS_IPSEC_DECAP_IF_NUMBER, NULL, NULL);
nss_core_register_handler(NSS_IPSEC_DECAP_IF_NUMBER, nss_ipsec_msg_handler, NULL);
}
/*
* nss_ipsec_msg_init()
* Initialize ipsec message.
*/
void nss_ipsec_msg_init(struct nss_ipsec_msg *nim, uint16_t if_num, uint32_t type, uint32_t len,
nss_ipsec_msg_callback_t cb, void *app_data)
{
nss_cmn_msg_init(&nim->cm, if_num, type, len, (void *)cb, app_data);
}
EXPORT_SYMBOL(nss_ipsec_msg_init);