blob: a1b8f90044f328a84da57b1616f6c6cefbfc804c [file] [log] [blame]
/*
**************************************************************************
* Copyright (c) 2013-2017, 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_ipv4.c
* NSS IPv4 APIs
*/
#include <linux/sysctl.h>
#include "nss_tx_rx_common.h"
#define NSS_IPV4_TX_MSG_TIMEOUT 1000 /* 1 sec timeout for IPv4 messages */
/*
* Private data structure for ipv4 configure messages
*/
struct nss_ipv4_cfg_pvt {
struct semaphore sem; /* Semaphore structure */
struct completion complete; /* completion structure */
int current_value; /* valid entry */
int response; /* Response from FW */
};
/*
* Private data structure for ipv4 connection information.
*/
struct nss_ipv4_conn_table_info {
uint32_t ce_table_size; /* Size of connection table entry in NSS FW */
uint32_t cme_table_size; /* Size of connection match table entry in NSS FW */
unsigned long ce_mem; /* Start address for connection entry table */
unsigned long cme_mem; /* Start address for connection match entry table */
} nss_ipv4_ct_info;
int nss_ipv4_conn_cfg __read_mostly = NSS_DEFAULT_NUM_CONN;
int nss_ipv4_accel_mode_cfg __read_mostly = 1;
static struct nss_ipv4_cfg_pvt i4_accel_mode_cfgp;
/*
* Callback for conn_sync_many request message.
*/
nss_ipv4_msg_callback_t nss_ipv4_conn_sync_many_msg_cb = NULL;
/*
* nss_ipv4_max_conn_count()
* Return the maximum number of IPv4 connections that the NSS acceleration engine supports.
*/
int nss_ipv4_max_conn_count(void)
{
return nss_ipv4_conn_cfg;
}
EXPORT_SYMBOL(nss_ipv4_max_conn_count);
/*
* nss_ipv4_conn_inquiry()
* Inquiry if a connection has been established in NSS FW
*/
nss_tx_status_t nss_ipv4_conn_inquiry(struct nss_ipv4_5tuple *ipv4_5t_p,
nss_ipv4_msg_callback_t cb)
{
nss_tx_status_t nss_tx_status;
struct nss_ipv4_msg nim;
struct nss_ctx_instance *nss_ctx = &nss_top_main.nss[0];
/*
* Initialize inquiry message structure.
* This is async message and the result will be returned
* to the caller by the msg_callback passed in.
*/
memset(&nim, 0, sizeof(nim));
nss_ipv4_msg_init(&nim, NSS_IPV4_RX_INTERFACE,
NSS_IPV4_TX_CONN_CFG_INQUIRY_MSG,
sizeof(struct nss_ipv4_inquiry_msg),
cb, NULL);
nim.msg.inquiry.rr.tuple = *ipv4_5t_p;
nss_tx_status = nss_ipv4_tx(nss_ctx, &nim);
if (nss_tx_status != NSS_TX_SUCCESS) {
nss_warning("%p: Send inquiry message failed\n", ipv4_5t_p);
}
return nss_tx_status;
}
EXPORT_SYMBOL(nss_ipv4_conn_inquiry);
/*
* nss_ipv4_driver_conn_sync_update()
* Update driver specific information from the messsage.
*/
static void nss_ipv4_driver_conn_sync_update(struct nss_ctx_instance *nss_ctx, struct nss_ipv4_conn_sync *nirs)
{
struct nss_top_instance *nss_top = nss_ctx->nss_top;
/*
* Update statistics maintained by NSS driver
*/
spin_lock_bh(&nss_top->stats_lock);
nss_top->stats_ipv4[NSS_STATS_IPV4_ACCELERATED_RX_PKTS] += nirs->flow_rx_packet_count + nirs->return_rx_packet_count;
nss_top->stats_ipv4[NSS_STATS_IPV4_ACCELERATED_RX_BYTES] += nirs->flow_rx_byte_count + nirs->return_rx_byte_count;
nss_top->stats_ipv4[NSS_STATS_IPV4_ACCELERATED_TX_PKTS] += nirs->flow_tx_packet_count + nirs->return_tx_packet_count;
nss_top->stats_ipv4[NSS_STATS_IPV4_ACCELERATED_TX_BYTES] += nirs->flow_tx_byte_count + nirs->return_tx_byte_count;
spin_unlock_bh(&nss_top->stats_lock);
}
/*
* nss_ipv4_driver_conn_sync_many_update()
* Update driver specific information from the conn_sync_many messsage.
*/
static void nss_ipv4_driver_conn_sync_many_update(struct nss_ctx_instance *nss_ctx, struct nss_ipv4_conn_sync_many_msg *nicsm)
{
int i;
/*
* Sanity check for the stats count
*/
if (nicsm->count * sizeof(struct nss_ipv4_conn_sync) >= nicsm->size) {
nss_warning("%p: stats sync count %u exceeds the size of this msg %u", nss_ctx, nicsm->count, nicsm->size);
return;
}
for (i = 0; i < nicsm->count; i++) {
nss_ipv4_driver_conn_sync_update(nss_ctx, &nicsm->conn_sync[i]);
}
}
/*
* nss_ipv4_driver_node_sync_update)
* Update driver specific information from the messsage.
*/
static void nss_ipv4_driver_node_sync_update(struct nss_ctx_instance *nss_ctx, struct nss_ipv4_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_IPV4_RX_INTERFACE][NSS_STATS_NODE_RX_PKTS] += nins->node_stats.rx_packets;
nss_top->stats_node[NSS_IPV4_RX_INTERFACE][NSS_STATS_NODE_RX_BYTES] += nins->node_stats.rx_bytes;
nss_top->stats_node[NSS_IPV4_RX_INTERFACE][NSS_STATS_NODE_RX_DROPPED] += nins->node_stats.rx_dropped;
nss_top->stats_node[NSS_IPV4_RX_INTERFACE][NSS_STATS_NODE_TX_PKTS] += nins->node_stats.tx_packets;
nss_top->stats_node[NSS_IPV4_RX_INTERFACE][NSS_STATS_NODE_TX_BYTES] += nins->node_stats.tx_bytes;
nss_top->stats_ipv4[NSS_STATS_IPV4_CONNECTION_CREATE_REQUESTS] += nins->ipv4_connection_create_requests;
nss_top->stats_ipv4[NSS_STATS_IPV4_CONNECTION_CREATE_COLLISIONS] += nins->ipv4_connection_create_collisions;
nss_top->stats_ipv4[NSS_STATS_IPV4_CONNECTION_CREATE_INVALID_INTERFACE] += nins->ipv4_connection_create_invalid_interface;
nss_top->stats_ipv4[NSS_STATS_IPV4_CONNECTION_DESTROY_REQUESTS] += nins->ipv4_connection_destroy_requests;
nss_top->stats_ipv4[NSS_STATS_IPV4_CONNECTION_DESTROY_MISSES] += nins->ipv4_connection_destroy_misses;
nss_top->stats_ipv4[NSS_STATS_IPV4_CONNECTION_HASH_HITS] += nins->ipv4_connection_hash_hits;
nss_top->stats_ipv4[NSS_STATS_IPV4_CONNECTION_HASH_REORDERS] += nins->ipv4_connection_hash_reorders;
nss_top->stats_ipv4[NSS_STATS_IPV4_CONNECTION_FLUSHES] += nins->ipv4_connection_flushes;
nss_top->stats_ipv4[NSS_STATS_IPV4_CONNECTION_EVICTIONS] += nins->ipv4_connection_evictions;
nss_top->stats_ipv4[NSS_STATS_IPV4_FRAGMENTATIONS] += nins->ipv4_fragmentations;
nss_top->stats_ipv4[NSS_STATS_IPV4_MC_CONNECTION_CREATE_REQUESTS] += nins->ipv4_mc_connection_create_requests;
nss_top->stats_ipv4[NSS_STATS_IPV4_MC_CONNECTION_UPDATE_REQUESTS] += nins->ipv4_mc_connection_update_requests;
nss_top->stats_ipv4[NSS_STATS_IPV4_MC_CONNECTION_CREATE_INVALID_INTERFACE] += nins->ipv4_mc_connection_create_invalid_interface;
nss_top->stats_ipv4[NSS_STATS_IPV4_MC_CONNECTION_DESTROY_REQUESTS] += nins->ipv4_mc_connection_destroy_requests;
nss_top->stats_ipv4[NSS_STATS_IPV4_MC_CONNECTION_DESTROY_MISSES] += nins->ipv4_mc_connection_destroy_misses;
nss_top->stats_ipv4[NSS_STATS_IPV4_MC_CONNECTION_FLUSHES] += nins->ipv4_mc_connection_flushes;
for (i = 0; i < NSS_EXCEPTION_EVENT_IPV4_MAX; i++) {
nss_top->stats_if_exception_ipv4[i] += nins->exception_events[i];
}
spin_unlock_bh(&nss_top->stats_lock);
}
/*
* nss_ipv4_rx_msg_handler()
* Handle NSS -> HLOS messages for IPv4 bridge/route
*/
static void nss_ipv4_rx_msg_handler(struct nss_ctx_instance *nss_ctx, struct nss_cmn_msg *ncm, __attribute__((unused))void *app_data)
{
struct nss_ipv4_msg *nim = (struct nss_ipv4_msg *)ncm;
nss_ipv4_msg_callback_t cb;
BUG_ON(ncm->interface != NSS_IPV4_RX_INTERFACE);
/*
* Sanity check the message type
*/
if (ncm->type >= NSS_IPV4_MAX_MSG_TYPES) {
nss_warning("%p: message type out of range: %d", nss_ctx, ncm->type);
return;
}
if (nss_cmn_get_msg_len(ncm) > sizeof(struct nss_ipv4_msg)) {
nss_warning("%p: message length is invalid: %d", nss_ctx, nss_cmn_get_msg_len(ncm));
return;
}
/*
* Trace messages.
*/
nss_ipv4_log_rx_msg(nim);
switch (nim->cm.type) {
case NSS_IPV4_RX_NODE_STATS_SYNC_MSG:
/*
* Update driver statistics on node sync.
*/
nss_ipv4_driver_node_sync_update(nss_ctx, &nim->msg.node_stats);
break;
case NSS_IPV4_RX_CONN_STATS_SYNC_MSG:
/*
* Update driver statistics on connection sync.
*/
nss_ipv4_driver_conn_sync_update(nss_ctx, &nim->msg.conn_stats);
break;
case NSS_IPV4_TX_CONN_STATS_SYNC_MANY_MSG:
/*
* Update driver statistics on connection sync many.
*/
nss_ipv4_driver_conn_sync_many_update(nss_ctx, &nim->msg.conn_stats_many);
ncm->cb = (nss_ptr_t)nss_ipv4_conn_sync_many_msg_cb;
break;
}
/*
* Update the callback and app_data for NOTIFY messages, IPv4 sends all notify messages
* to the same callback/app_data.
*/
if (nim->cm.response == NSS_CMM_RESPONSE_NOTIFY) {
ncm->cb = (nss_ptr_t)nss_ctx->nss_top->ipv4_callback;
ncm->app_data = (nss_ptr_t)nss_ctx->nss_top->ipv4_ctx;
}
/*
* Do we have a callback?
*/
if (!ncm->cb) {
return;
}
/*
* Callback
*/
cb = (nss_ipv4_msg_callback_t)ncm->cb;
cb((void *)ncm->app_data, nim);
}
/*
* nss_ipv4_tx_with_size()
* Transmit an ipv4 message to the FW with a specified size.
*/
nss_tx_status_t nss_ipv4_tx_with_size(struct nss_ctx_instance *nss_ctx, struct nss_ipv4_msg *nim, uint32_t size)
{
struct nss_ipv4_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: ipv4 msg dropped as core not ready", nss_ctx);
return NSS_TX_FAILURE_NOT_READY;
}
/*
* Sanity check the message
*/
if (ncm->interface != NSS_IPV4_RX_INTERFACE) {
nss_warning("%p: tx request for another interface: %d", nss_ctx, ncm->interface);
return NSS_TX_FAILURE;
}
if (ncm->type >= NSS_IPV4_MAX_MSG_TYPES) {
nss_warning("%p: message type out of range: %d", nss_ctx, ncm->type);
return NSS_TX_FAILURE;
}
if (nss_cmn_get_msg_len(ncm) > sizeof(struct nss_ipv4_msg)) {
nss_warning("%p: message length is invalid: %d", nss_ctx, nss_cmn_get_msg_len(ncm));
return NSS_TX_FAILURE;
}
if(size > PAGE_SIZE) {
nss_warning("%p: tx request size too large: %u", nss_ctx, size);
return NSS_TX_FAILURE;
}
nbuf = dev_alloc_skb(size);
if (unlikely(!nbuf)) {
NSS_PKT_STATS_INCREMENT(nss_ctx, &nss_ctx->nss_top->stats_drv[NSS_STATS_DRV_NBUF_ALLOC_FAILS]);
nss_warning("%p: msg dropped as command allocation failed", nss_ctx);
return NSS_TX_FAILURE;
}
/*
* Copy the message to our skb.
*/
nim2 = (struct nss_ipv4_msg *)skb_put(nbuf, size);
memcpy(nim2, nim, sizeof(struct nss_ipv4_msg));
/*
* Trace messages.
*/
nss_ipv4_log_tx_msg(nim);
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_warning("%p: unable to enqueue IPv4 msg\n", nss_ctx);
return NSS_TX_FAILURE;
}
nss_hal_send_interrupt(nss_ctx, NSS_H2N_INTR_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;
}
EXPORT_SYMBOL(nss_ipv4_tx_with_size);
/*
* nss_ipv4_tx()
* Transmit an ipv4 message to the FW.
*/
nss_tx_status_t nss_ipv4_tx(struct nss_ctx_instance *nss_ctx, struct nss_ipv4_msg *nim)
{
return nss_ipv4_tx_with_size(nss_ctx, nim, NSS_NBUF_PAYLOAD_SIZE);
}
EXPORT_SYMBOL(nss_ipv4_tx);
/*
**********************************
Register/Unregister/Miscellaneous APIs
**********************************
*/
/*
* nss_ipv4_notify_register()
* Register to received IPv4 events.
*
* NOTE: Do we want to pass an nss_ctx here so that we can register for ipv4 on any core?
*/
struct nss_ctx_instance *nss_ipv4_notify_register(nss_ipv4_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.ipv4_callback = cb;
nss_top_main.ipv4_ctx = app_data;
return &nss_top_main.nss[nss_top_main.ipv4_handler_id];
}
EXPORT_SYMBOL(nss_ipv4_notify_register);
/*
* nss_ipv4_notify_unregister()
* Unregister to received IPv4 events.
*
* NOTE: Do we want to pass an nss_ctx here so that we can register for ipv4 on any core?
*/
void nss_ipv4_notify_unregister(void)
{
nss_top_main.ipv4_callback = NULL;
}
EXPORT_SYMBOL(nss_ipv4_notify_unregister);
/*
* nss_ipv4_conn_sync_many_notify_register()
* Register to receive IPv4 conn_sync_many message response.
*/
void nss_ipv4_conn_sync_many_notify_register(nss_ipv4_msg_callback_t cb)
{
nss_ipv4_conn_sync_many_msg_cb = cb;
}
EXPORT_SYMBOL(nss_ipv4_conn_sync_many_notify_register);
/*
* nss_ipv4_conn_sync_many_notify_unregister()
* Unregister to receive IPv4 conn_sync_many message response.
*/
void nss_ipv4_conn_sync_many_notify_unregister(void)
{
nss_ipv4_conn_sync_many_msg_cb = NULL;
}
EXPORT_SYMBOL(nss_ipv4_conn_sync_many_notify_unregister);
/*
* nss_ipv4_get_mgr()
*
* TODO: This only suppports a single ipv4, do we ever want to support more?
*/
struct nss_ctx_instance *nss_ipv4_get_mgr(void)
{
return (void *)&nss_top_main.nss[nss_top_main.ipv4_handler_id];
}
EXPORT_SYMBOL(nss_ipv4_get_mgr);
/*
* nss_ipv4_register_handler()
* Register our handler to receive messages for this interface
*/
void nss_ipv4_register_handler(void)
{
struct nss_ctx_instance *nss_ctx = nss_ipv4_get_mgr();
if (nss_core_register_handler(nss_ctx, NSS_IPV4_RX_INTERFACE, nss_ipv4_rx_msg_handler, NULL) != NSS_CORE_STATUS_SUCCESS) {
nss_warning("IPv4 handler failed to register");
}
}
/*
* nss_ipv4_conn_cfg_process_callback()
* Call back function for the ipv4 connection configure process
*/
static void nss_ipv4_conn_cfg_process_callback(void *app_data, struct nss_ipv4_msg *nim)
{
struct nss_ipv4_rule_conn_cfg_msg *nirccm = &nim->msg.rule_conn_cfg;
struct nss_ctx_instance *nss_ctx __maybe_unused = nss_ipv4_get_mgr();
if (nim->cm.response != NSS_CMN_RESPONSE_ACK) {
nss_warning("%p: IPv4 connection configuration failed with error: %d\n", nss_ctx, nim->cm.error);
nss_core_update_max_ipv4_conn(NSS_DEFAULT_NUM_CONN);
nss_ipv4_free_conn_tables();
return;
}
nss_ipv4_conn_cfg = ntohl(nirccm->num_conn);
nss_warning("%p: IPv4 connection configuration success: %d\n", nss_ctx, nim->cm.error);
}
/*
* nss_ipv4_conn_cfg_process()
* Process request to configure number of ipv4 connections
*/
static int nss_ipv4_conn_cfg_process(struct nss_ctx_instance *nss_ctx, int conn)
{
struct nss_ipv4_msg nim;
struct nss_ipv4_rule_conn_cfg_msg *nirccm;
nss_tx_status_t nss_tx_status;
if ((!nss_ipv4_ct_info.ce_table_size) || (!nss_ipv4_ct_info.cme_table_size)) {
nss_warning("%p: connection entry or connection match entry table size not available\n",
nss_ctx);
return -EINVAL;
}
nss_info("%p: IPv4 supported connections: %d\n", nss_ctx, conn);
nss_ipv4_ct_info.ce_mem = __get_free_pages(GFP_KERNEL | __GFP_NOWARN | __GFP_ZERO,
get_order(nss_ipv4_ct_info.ce_table_size));
if (!nss_ipv4_ct_info.ce_mem) {
nss_warning("%p: Memory allocation failed for IPv4 Connections: %d\n",
nss_ctx,
conn);
goto fail;
}
nss_ipv4_ct_info.cme_mem = __get_free_pages(GFP_KERNEL | __GFP_NOWARN | __GFP_ZERO,
get_order(nss_ipv4_ct_info.cme_table_size));
if (!nss_ipv4_ct_info.ce_mem) {
nss_warning("%p: Memory allocation failed for IPv4 Connections: %d\n",
nss_ctx,
conn);
goto fail;
}
memset(&nim, 0, sizeof(struct nss_ipv4_msg));
nss_ipv4_msg_init(&nim, NSS_IPV4_RX_INTERFACE, NSS_IPV4_TX_CONN_CFG_RULE_MSG,
sizeof(struct nss_ipv4_rule_conn_cfg_msg), nss_ipv4_conn_cfg_process_callback, NULL);
nirccm = &nim.msg.rule_conn_cfg;
nirccm->num_conn = htonl(conn);
nirccm->ce_mem = dma_map_single(NULL, (void *)nss_ipv4_ct_info.ce_mem, nss_ipv4_ct_info.ce_table_size, DMA_TO_DEVICE);
nirccm->cme_mem = dma_map_single(NULL, (void *)nss_ipv4_ct_info.cme_mem, nss_ipv4_ct_info.cme_table_size, DMA_TO_DEVICE);
nss_tx_status = nss_ipv4_tx(nss_ctx, &nim);
if (nss_tx_status != NSS_TX_SUCCESS) {
nss_warning("%p: nss_tx error setting IPv4 Connections: %d\n",
nss_ctx,
conn);
goto fail;
}
return 0;
fail:
nss_ipv4_free_conn_tables();
return -EINVAL;;
}
/*
* nss_ipv4_update_conn_count_callback()
* Callback function for the ipv4 get connection info message.
*/
static void nss_ipv4_update_conn_count_callback(void *app_data, struct nss_ipv4_msg *nim)
{
struct nss_ipv4_rule_conn_get_table_size_msg *nircgts = &nim->msg.size;
struct nss_ctx_instance *nss_ctx = nss_ipv4_get_mgr();
if (nim->cm.response != NSS_CMN_RESPONSE_ACK) {
nss_warning("%p: IPv4 fetch connection info failed with error: %d\n", nss_ctx, nim->cm.error);
nss_core_update_max_ipv4_conn(NSS_DEFAULT_NUM_CONN);
return;
}
nss_info("IPv4 get connection info success\n");
nss_ipv4_ct_info.ce_table_size = ntohl(nircgts->ce_table_size);
nss_ipv4_ct_info.cme_table_size = ntohl(nircgts->cme_table_size);
if (nss_ipv4_conn_cfg_process(nss_ctx, ntohl(nircgts->num_conn)) != 0) {
nss_warning("%p: IPv4 connection entry or connection match entry table size\
not available\n", nss_ctx);
}
return;
}
/*
* nss_ipv4_update_conn_count()
* Sets the maximum number of IPv4 connections.
*
* It first gets the connection tables size information from NSS FW
* and then configures the connections in NSS FW.
*/
int nss_ipv4_update_conn_count(int ipv4_num_conn)
{
struct nss_ctx_instance *nss_ctx = nss_ipv4_get_mgr();
struct nss_ipv4_msg nim;
struct nss_ipv4_rule_conn_get_table_size_msg *nircgts;
nss_tx_status_t nss_tx_status;
uint32_t sum_of_conn;
/*
* By default, NSS FW is configured with default number of connections.
*/
if (ipv4_num_conn == NSS_DEFAULT_NUM_CONN) {
nss_info("%p: Default number of connections (%d) already configured\n", nss_ctx, ipv4_num_conn);
return 0;
}
/*
* The input should be multiple of 1024.
* Input for ipv4 and ipv6 sum together should not exceed 8k
* Min. value should be at least 256 connections. This is the
* minimum connections we will support for each of them.
*/
sum_of_conn = ipv4_num_conn + nss_ipv6_conn_cfg;
if ((ipv4_num_conn & NSS_NUM_CONN_QUANTA_MASK) ||
(sum_of_conn > NSS_MAX_TOTAL_NUM_CONN_IPV4_IPV6) ||
(ipv4_num_conn < NSS_MIN_NUM_CONN)) {
nss_warning("%p: input supported connections (%d) does not adhere\
specifications\n1) not multiple of 1024,\n2) is less than \
min val: %d, OR\n IPv4/6 total exceeds %d\n",
nss_ctx,
ipv4_num_conn,
NSS_MIN_NUM_CONN,
NSS_MAX_TOTAL_NUM_CONN_IPV4_IPV6);
return -EINVAL;
}
memset(&nim, 0, sizeof(struct nss_ipv4_msg));
nss_ipv4_msg_init(&nim, NSS_IPV4_RX_INTERFACE, NSS_IPV4_TX_CONN_TABLE_SIZE_MSG,
sizeof(struct nss_ipv4_rule_conn_get_table_size_msg), nss_ipv4_update_conn_count_callback, NULL);
nircgts = &nim.msg.size;
nircgts->num_conn = htonl(ipv4_num_conn);
nss_tx_status = nss_ipv4_tx(nss_ctx, &nim);
if (nss_tx_status != NSS_TX_SUCCESS) {
nss_warning("%p: Send fetch connection info message failed\n", nss_ctx);
return -EINVAL;
}
return 0;
}
/*
* nss_ipv4_accel_mode_cfg_callback()
* call back function for the ipv4 acceleration mode configurate handler
*/
static void nss_ipv4_accel_mode_cfg_callback(void *app_data, struct nss_ipv4_msg *nim)
{
if (nim->cm.response != NSS_CMN_RESPONSE_ACK) {
nss_warning("IPv4 acceleration mode configuration failed with error: %d\n", nim->cm.error);
i4_accel_mode_cfgp.response = NSS_FAILURE;
complete(&i4_accel_mode_cfgp.complete);
return;
}
nss_info("IPv4 acceleration mode configuration success\n");
i4_accel_mode_cfgp.response = NSS_SUCCESS;
complete(&i4_accel_mode_cfgp.complete);
}
/*
* nss_ipv4_free_conn_tables()
* Frees memory allocated for connection tables
*/
void nss_ipv4_free_conn_tables(void)
{
if (nss_ipv4_ct_info.ce_mem) {
free_pages(nss_ipv4_ct_info.ce_mem, get_order(nss_ipv4_ct_info.ce_table_size));
}
if (nss_ipv4_ct_info.cme_mem) {
free_pages(nss_ipv4_ct_info.cme_mem, get_order(nss_ipv4_ct_info.cme_table_size));
}
memset(&nss_ipv4_ct_info, 0, sizeof(struct nss_ipv4_conn_table_info));
return;
}
/*
* nss_ipv4_accel_mode_cfg_handler()
* Configure acceleration mode for IPv4
*/
static int nss_ipv4_accel_mode_cfg_handler(struct ctl_table *ctl, int write, void __user *buffer, size_t *lenp, loff_t *ppos)
{
struct nss_top_instance *nss_top = &nss_top_main;
struct nss_ctx_instance *nss_ctx = &nss_top->nss[0];
struct nss_ipv4_msg nim;
struct nss_ipv4_accel_mode_cfg_msg *nipcm;
nss_tx_status_t nss_tx_status;
int ret = NSS_FAILURE;
/*
* Acquiring semaphore
*/
down(&i4_accel_mode_cfgp.sem);
/*
* Take snap shot of current value
*/
i4_accel_mode_cfgp.current_value = nss_ipv4_accel_mode_cfg;
/*
* Write the variable with user input
*/
ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
if (ret || (!write)) {
up(&i4_accel_mode_cfgp.sem);
return ret;
}
memset(&nim, 0, sizeof(struct nss_ipv4_msg));
nss_ipv4_msg_init(&nim, NSS_IPV4_RX_INTERFACE, NSS_IPV4_TX_ACCEL_MODE_CFG_MSG,
sizeof(struct nss_ipv4_accel_mode_cfg_msg), nss_ipv4_accel_mode_cfg_callback, NULL);
nipcm = &nim.msg.accel_mode_cfg;
nipcm->mode = htonl(nss_ipv4_accel_mode_cfg);
nss_tx_status = nss_ipv4_tx(nss_ctx, &nim);
if (nss_tx_status != NSS_TX_SUCCESS) {
nss_warning("%p: Send acceleration mode message failed\n", nss_ctx);
goto fail;
}
/*
* Blocking call, wait till we get ACK for this msg.
*/
ret = wait_for_completion_timeout(&i4_accel_mode_cfgp.complete, msecs_to_jiffies(NSS_IPV4_TX_MSG_TIMEOUT));
if (ret == 0) {
nss_warning("%p: Waiting for ack timed out\n", nss_ctx);
goto fail;
}
if (NSS_FAILURE == i4_accel_mode_cfgp.response) {
nss_warning("%p: accel mode configure failed\n", nss_ctx);
goto fail;
}
up(&i4_accel_mode_cfgp.sem);
return 0;
fail:
nss_ipv4_accel_mode_cfg = i4_accel_mode_cfgp.current_value;
up(&i4_accel_mode_cfgp.sem);
return -EIO;
}
static struct ctl_table nss_ipv4_table[] = {
{
.procname = "ipv4_accel_mode",
.data = &nss_ipv4_accel_mode_cfg,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &nss_ipv4_accel_mode_cfg_handler,
},
{ }
};
static struct ctl_table nss_ipv4_dir[] = {
{
.procname = "ipv4cfg",
.mode = 0555,
.child = nss_ipv4_table,
},
{ }
};
static struct ctl_table nss_ipv4_root_dir[] = {
{
.procname = "nss",
.mode = 0555,
.child = nss_ipv4_dir,
},
{ }
};
static struct ctl_table nss_ipv4_root[] = {
{
.procname = "dev",
.mode = 0555,
.child = nss_ipv4_root_dir,
},
{ }
};
static struct ctl_table_header *nss_ipv4_header;
/*
* nss_ipv4_register_sysctl()
* Register sysctl specific to ipv4
*/
void nss_ipv4_register_sysctl(void)
{
sema_init(&i4_accel_mode_cfgp.sem, 1);
init_completion(&i4_accel_mode_cfgp.complete);
/*
* Register sysctl table.
*/
nss_ipv4_header = register_sysctl_table(nss_ipv4_root);
}
/*
* nss_ipv4_unregister_sysctl()
* Unregister sysctl specific to ipv4
*/
void nss_ipv4_unregister_sysctl(void)
{
/*
* Unregister sysctl table.
*/
if (nss_ipv4_header) {
unregister_sysctl_table(nss_ipv4_header);
}
}
/*
* nss_ipv4_msg_init()
* Initialize IPv4 message.
*/
void nss_ipv4_msg_init(struct nss_ipv4_msg *nim, uint16_t if_num, uint32_t type, uint32_t len,
nss_ipv4_msg_callback_t cb, void *app_data)
{
nss_cmn_msg_init(&nim->cm, if_num, type, len, (void *)cb, app_data);
}
EXPORT_SYMBOL(nss_ipv4_msg_init);