blob: 643793208118a51304a02f4ea06f817452f8ac4e [file] [log] [blame]
/*
**************************************************************************
* Copyright (c) 2014, 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_ipv6.c
* NSS IPv6 APIs
*/
#include <linux/ppp_channel.h>
#include "nss_tx_rx_common.h"
extern void nss_rx_metadata_ipv6_rule_establish(struct nss_ctx_instance *nss_ctx, struct nss_ipv6_rule_establish *nire);
extern void nss_rx_metadata_ipv6_create_response(struct nss_ctx_instance *nss_ctx, struct nss_ipv6_msg *nim);
extern void nss_rx_ipv6_sync(struct nss_ctx_instance *nss_ctx, struct nss_ipv6_conn_sync *nirs);
/*
* nss_ipv6_driver_conn_sync_update()
* Update driver specific information from the messsage.
*/
static void nss_ipv6_driver_conn_sync_update(struct nss_ctx_instance *nss_ctx, struct nss_ipv6_conn_sync *nics)
{
struct nss_top_instance *nss_top = nss_ctx->nss_top;
struct net_device *pppoe_dev = NULL;
/*
* Update statistics maintained by NSS driver
*/
spin_lock_bh(&nss_top->stats_lock);
nss_top->stats_ipv6[NSS_STATS_IPV6_ACCELERATED_RX_PKTS] += nics->flow_rx_packet_count + nics->return_rx_packet_count;
nss_top->stats_ipv6[NSS_STATS_IPV6_ACCELERATED_RX_BYTES] += nics->flow_rx_byte_count + nics->return_rx_byte_count;
nss_top->stats_ipv6[NSS_STATS_IPV6_ACCELERATED_TX_PKTS] += nics->flow_tx_packet_count + nics->return_tx_packet_count;
nss_top->stats_ipv6[NSS_STATS_IPV6_ACCELERATED_TX_BYTES] += nics->flow_tx_byte_count + nics->return_tx_byte_count;
spin_unlock_bh(&nss_top->stats_lock);
/*
* Update the PPPoE interface stats, if there is any PPPoE session on the interfaces.
*/
if (nics->flow_pppoe_session_id) {
pppoe_dev = ppp_session_to_netdev(nics->flow_pppoe_session_id, (uint8_t *)nics->flow_pppoe_remote_mac);
if (pppoe_dev) {
ppp_update_stats(pppoe_dev, nics->flow_rx_packet_count, nics->flow_rx_byte_count,
nics->flow_tx_packet_count, nics->flow_tx_byte_count);
dev_put(pppoe_dev);
}
}
if (nics->return_pppoe_session_id) {
pppoe_dev = ppp_session_to_netdev(nics->return_pppoe_session_id, (uint8_t *)nics->return_pppoe_remote_mac);
if (pppoe_dev) {
ppp_update_stats(pppoe_dev, nics->return_rx_packet_count, nics->return_rx_byte_count,
nics->return_tx_packet_count, nics->return_tx_byte_count);
dev_put(pppoe_dev);
}
}
}
/*
* nss_ipv6_driver_node_sync_update)
* Update driver specific information from the messsage.
*/
static void nss_ipv6_driver_node_sync_update(struct nss_ctx_instance *nss_ctx, struct nss_ipv6_node_sync *nins)
{
struct nss_top_instance *nss_top = nss_ctx->nss_top;
uint32_t i;
/*
* Update statistics maintained by NSS driver
*/
spin_lock_bh(&nss_top->stats_lock);
nss_top->stats_node[NSS_IPV6_RX_INTERFACE][NSS_STATS_NODE_RX_PKTS] += nins->node_stats.rx_packets;
nss_top->stats_node[NSS_IPV6_RX_INTERFACE][NSS_STATS_NODE_RX_BYTES] += nins->node_stats.rx_bytes;
nss_top->stats_node[NSS_IPV6_RX_INTERFACE][NSS_STATS_NODE_RX_DROPPED] += nins->node_stats.rx_dropped;
nss_top->stats_node[NSS_IPV6_RX_INTERFACE][NSS_STATS_NODE_TX_PKTS] += nins->node_stats.tx_packets;
nss_top->stats_node[NSS_IPV6_RX_INTERFACE][NSS_STATS_NODE_TX_BYTES] += nins->node_stats.tx_bytes;
nss_top->stats_ipv6[NSS_STATS_IPV6_CONNECTION_CREATE_REQUESTS] += nins->ipv6_connection_create_requests;
nss_top->stats_ipv6[NSS_STATS_IPV6_CONNECTION_CREATE_COLLISIONS] += nins->ipv6_connection_create_collisions;
nss_top->stats_ipv6[NSS_STATS_IPV6_CONNECTION_CREATE_INVALID_INTERFACE] += nins->ipv6_connection_create_invalid_interface;
nss_top->stats_ipv6[NSS_STATS_IPV6_CONNECTION_DESTROY_REQUESTS] += nins->ipv6_connection_destroy_requests;
nss_top->stats_ipv6[NSS_STATS_IPV6_CONNECTION_DESTROY_MISSES] += nins->ipv6_connection_destroy_misses;
nss_top->stats_ipv6[NSS_STATS_IPV6_CONNECTION_HASH_HITS] += nins->ipv6_connection_hash_hits;
nss_top->stats_ipv6[NSS_STATS_IPV6_CONNECTION_HASH_REORDERS] += nins->ipv6_connection_hash_reorders;
nss_top->stats_ipv6[NSS_STATS_IPV6_CONNECTION_FLUSHES] += nins->ipv6_connection_flushes;
nss_top->stats_ipv6[NSS_STATS_IPV6_CONNECTION_EVICTIONS] += nins->ipv6_connection_evictions;
for (i = 0; i < NSS_EXCEPTION_EVENT_IPV6_MAX; i++) {
nss_top->stats_if_exception_ipv6[i] += nins->exception_events[i];
}
spin_unlock_bh(&nss_top->stats_lock);
}
/*
* nss_ipv6_rx_msg_handler()
* Handle NSS -> HLOS messages for IPv6 bridge/route
*/
static void nss_ipv6_rx_msg_handler(struct nss_ctx_instance *nss_ctx, struct nss_cmn_msg *ncm, __attribute__((unused))void *app_data)
{
struct nss_ipv6_msg *nim = (struct nss_ipv6_msg *)ncm;
nss_ipv6_msg_callback_t cb;
BUG_ON(ncm->interface != NSS_IPV6_RX_INTERFACE);
/*
* Is this a valid request/response packet?
*/
if (nim->cm.type >= NSS_IPV6_MAX_MSG_TYPES) {
nss_warning("%p: received invalid message %d for IPv6 interface", nss_ctx, nim->cm.type);
return;
}
if (ncm->len > sizeof(struct nss_ipv6_msg)) {
nss_warning("%p: tx request for another interface: %d", nss_ctx, ncm->interface);
return;
}
/*
* Log failures
*/
nss_core_log_msg_failures(nss_ctx, ncm);
/*
* Handle deprecated messages. Eventually these messages should be removed.
*/
switch (nim->cm.type) {
case NSS_IPV6_RX_ESTABLISH_RULE_MSG:
nss_rx_metadata_ipv6_rule_establish(nss_ctx, &nim->msg.rule_establish);
break;
case NSS_IPV6_RX_NODE_STATS_SYNC_MSG:
/*
* Update driver statistics on node sync.
*/
nss_ipv6_driver_node_sync_update(nss_ctx, &nim->msg.node_stats);
break;
case NSS_IPV6_RX_CONN_STATS_SYNC_MSG:
/*
* Update driver statistics on connection sync.
*/
nss_ipv6_driver_conn_sync_update(nss_ctx, &nim->msg.conn_stats);
return nss_rx_ipv6_sync(nss_ctx, &nim->msg.conn_stats);
break;
case NSS_IPV6_TX_CREATE_RULE_MSG:
nss_rx_metadata_ipv6_create_response(nss_ctx, nim);
break;
}
/*
* Update the callback and app_data for NOTIFY messages, IPv6 sends all notify messages
* to the same callback/app_data.
*/
if (nim->cm.response == NSS_CMM_RESPONSE_NOTIFY) {
ncm->cb = (uint32_t)nss_ctx->nss_top->ipv6_callback;
ncm->app_data = (uint32_t)nss_ctx->nss_top->ipv6_ctx;
}
/*
* Do we have a callback?
*/
if (!ncm->cb) {
return;
}
/*
* Callback
*/
cb = (nss_ipv6_msg_callback_t)ncm->cb;
cb((void *)ncm->app_data, nim);
}
/*
* nss_ipv6_tx()
* Transmit an ipv6 message to the FW.
*/
nss_tx_status_t nss_ipv6_tx(struct nss_ctx_instance *nss_ctx, struct nss_ipv6_msg *nim)
{
struct nss_ipv6_msg *nim2;
struct nss_cmn_msg *ncm = &nim->cm;
struct sk_buff *nbuf;
int32_t status;
NSS_VERIFY_CTX_MAGIC(nss_ctx);
if (unlikely(nss_ctx->state != NSS_CORE_STATE_INITIALIZED)) {
nss_warning("%p: ipv6 msg dropped as core not ready", nss_ctx);
return NSS_TX_FAILURE_NOT_READY;
}
/*
* Sanity check the message
*/
if (ncm->interface != NSS_IPV6_RX_INTERFACE) {
nss_warning("%p: tx request for another interface: %d", nss_ctx, ncm->interface);
return NSS_TX_FAILURE;
}
if (ncm->type > NSS_IPV6_MAX_MSG_TYPES) {
nss_warning("%p: message type out of range: %d", nss_ctx, ncm->type);
return NSS_TX_FAILURE;
}
if (ncm->len > sizeof(struct nss_ipv6_msg)) {
nss_warning("%p: tx request for another interface: %d", nss_ctx, ncm->interface);
return NSS_TX_FAILURE;
}
nbuf = nss_skb_alloc(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_warning("%p: msg dropped as command allocation failed", nss_ctx);
return NSS_TX_FAILURE;
}
/*
* Copy the message to our skb.
*/
nim2 = (struct nss_ipv6_msg *)skb_put(nbuf, sizeof(struct nss_ipv6_msg));
memcpy(nim2, nim, sizeof(struct nss_ipv6_msg));
status = nss_core_send_buffer(nss_ctx, 0, nbuf, NSS_IF_CMD_QUEUE, H2N_BUFFER_CTRL, 0);
if (status != NSS_CORE_STATUS_SUCCESS) {
nss_skb_free(nbuf);
nss_warning("%p: Unable to enqueue 'Destroy IPv6' rule\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);
NSS_PKT_STATS_INCREMENT(nss_ctx, &nss_ctx->nss_top->stats_drv[NSS_STATS_DRV_TX_CMD_REQ]);
return NSS_TX_SUCCESS;
}
/*
**********************************
Register/Unregister/Miscellaneous APIs
**********************************
*/
/*
* nss_ipv6_notify_register()
* Register to received IPv6 events.
*
* NOTE: Do we want to pass an nss_ctx here so that we can register for ipv6 on any core?
*/
struct nss_ctx_instance *nss_ipv6_notify_register(nss_ipv6_msg_callback_t cb, void *app_data)
{
/*
* TODO: We need to have a new array in support of the new API
* TODO: If we use a per-context array, we would move the array into nss_ctx based.
*/
nss_top_main.ipv6_callback = cb;
nss_top_main.ipv6_ctx = app_data;
return &nss_top_main.nss[nss_top_main.ipv6_handler_id];
}
/*
* nss_ipv6_notify_unregister()
* Unregister to received IPv6 events.
*
* NOTE: Do we want to pass an nss_ctx here so that we can register for ipv6 on any core?
*/
void nss_ipv6_notify_unregister(void)
{
nss_top_main.ipv6_callback = NULL;
}
/*
* nss_ipv6_get_mgr()
*
* TODO: This only suppports a single ipv6, do we ever want to support more?
*/
struct nss_ctx_instance *nss_ipv6_get_mgr(void)
{
return (void *)&nss_top_main.nss[nss_top_main.ipv6_handler_id];
}
/*
* nss_ipv6_register_handler()
* Register our handler to receive messages for this interface
*/
void nss_ipv6_register_handler()
{
if (nss_core_register_handler(NSS_IPV6_RX_INTERFACE, nss_ipv6_rx_msg_handler, NULL) != NSS_CORE_STATUS_SUCCESS) {
nss_warning("IPv6 handler failed to register");
}
}
EXPORT_SYMBOL(nss_ipv6_tx);
EXPORT_SYMBOL(nss_ipv6_notify_register);
EXPORT_SYMBOL(nss_ipv6_notify_unregister);
EXPORT_SYMBOL(nss_ipv6_get_mgr);
EXPORT_SYMBOL(nss_ipv6_register_handler);