| /* |
| ************************************************************************** |
| * Copyright (c) 2014 - 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_ipv6.c |
| * NSS IPv6 APIs |
| */ |
| #include <linux/ppp_channel.h> |
| #include "nss_tx_rx_common.h" |
| |
| int nss_ipv6_conn_cfg __read_mostly = NSS_DEFAULT_NUM_CONN; |
| static struct nss_conn_cfg_pvt i6cfgp; |
| |
| /* |
| * 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; |
| #if (NSS_PPP_SUPPORT == 1) |
| struct net_device *pppoe_dev = NULL; |
| #endif |
| |
| /* |
| * 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 (NSS_PPP_SUPPORT == 1) |
| 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); |
| } |
| } |
| #endif |
| } |
| |
| /* |
| * 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 (ncm->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_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); |
| 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 = 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_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) { |
| dev_kfree_skb_any(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"); |
| } |
| } |
| |
| /* |
| * nss_ipv6_conn_cfg_callback() |
| * call back function for the ipv6 connection configuration handler |
| */ |
| static void nss_ipv6_conn_cfg_callback(void *app_data, struct nss_ipv6_msg *nim) |
| { |
| if (nim->cm.response != NSS_CMN_RESPONSE_ACK) { |
| /* |
| * Error, hence we are not updating the nss_ipv4_conn_cfg |
| * Restore the current_value to its previous state |
| */ |
| i6cfgp.response = NSS_FAILURE; |
| complete(&i6cfgp.complete); |
| return; |
| } |
| |
| /* |
| * Sucess at NSS FW, hence updating nss_ipv4_conn_cfg, with the valid value |
| * saved at the sysctl handler. |
| */ |
| nss_info("IPv6 connection configuration success: %d\n", nim->cm.error); |
| i6cfgp.response = NSS_SUCCESS; |
| complete(&i6cfgp.complete); |
| } |
| |
| |
| /* |
| * nss_ipv6_conn_cfg_handler() |
| * Sets the number of connections for IPv6 |
| */ |
| static int nss_ipv6_conn_cfg_handler(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_ipv6_msg nim; |
| struct nss_ipv6_rule_conn_cfg_msg *nirccm; |
| nss_tx_status_t nss_tx_status; |
| int ret = NSS_FAILURE; |
| uint32_t sum_of_conn; |
| |
| /* |
| * Acquiring semaphore |
| */ |
| down(&i6cfgp.sem); |
| |
| /* |
| * Take a snapshot of the current value |
| */ |
| i6cfgp.current_value = nss_ipv6_conn_cfg; |
| |
| ret = proc_dointvec(ctl, write, buffer, lenp, ppos); |
| if (ret || (!write)) { |
| up(&i6cfgp.sem); |
| return ret; |
| } |
| |
| /* |
| * Specifications for input |
| * 1) The input should be power of 2. |
| * 2) Input for ipv4 and ipv6 sum togther should not exceed 8k |
| * 3) Min. value should be at leat 256 connections. This is the |
| * minimum connections we will support for each of them. |
| */ |
| sum_of_conn = nss_ipv4_conn_cfg + nss_ipv6_conn_cfg; |
| if ((nss_ipv6_conn_cfg & NSS_NUM_CONN_QUANTA_MASK) || |
| (sum_of_conn > NSS_MAX_TOTAL_NUM_CONN_IPV4_IPV6) || |
| (nss_ipv6_conn_cfg < NSS_MIN_NUM_CONN)) { |
| nss_warning("%p: input supported connections (%d) does not adhere\ |
| specifications\n1) not power of 2,\n2) is less than \ |
| min val: %d, OR\n IPv4/6 total exceeds %d\n", |
| nss_ctx, |
| nss_ipv6_conn_cfg, |
| NSS_MIN_NUM_CONN, |
| NSS_MAX_TOTAL_NUM_CONN_IPV4_IPV6); |
| |
| /* |
| * Restore the current_value to its previous state |
| */ |
| nss_ipv6_conn_cfg = i6cfgp.current_value; |
| up(&i6cfgp.sem); |
| return NSS_FAILURE; |
| } |
| |
| |
| nss_info("%p: IPv6 supported connections: %d\n", nss_ctx, nss_ipv6_conn_cfg); |
| |
| nss_ipv6_msg_init(&nim, NSS_IPV6_RX_INTERFACE, NSS_IPV6_TX_CONN_CFG_RULE_MSG, |
| sizeof(struct nss_ipv6_rule_conn_cfg_msg), (nss_ipv6_msg_callback_t *)nss_ipv6_conn_cfg_callback, NULL); |
| |
| nirccm = &nim.msg.rule_conn_cfg; |
| nirccm->num_conn = htonl(nss_ipv6_conn_cfg); |
| nss_tx_status = nss_ipv6_tx(nss_ctx, &nim); |
| |
| if (nss_tx_status != NSS_TX_SUCCESS) { |
| nss_warning("%p: nss_tx error setting IPv6 Connections: %d\n", |
| nss_ctx, |
| nss_ipv6_conn_cfg); |
| |
| /* |
| * Restore the current_value to its previous state |
| */ |
| nss_ipv6_conn_cfg = i6cfgp.current_value; |
| up(&i6cfgp.sem); |
| return NSS_FAILURE; |
| } |
| |
| /* |
| * Blocking call, wait till we get ACK for this msg. |
| */ |
| ret = wait_for_completion_timeout(&i6cfgp.complete, msecs_to_jiffies(NSS_CONN_CFG_TIMEOUT)); |
| if (ret == 0) { |
| nss_warning("%p: Waiting for ack timed out\n", nss_ctx); |
| |
| /* |
| * Restore the current_value to its previous state |
| */ |
| nss_ipv6_conn_cfg = i6cfgp.current_value; |
| up(&i6cfgp.sem); |
| return NSS_FAILURE; |
| } |
| |
| /* |
| * ACK/NACK received from NSS FW |
| * If ACK: Callback function will update nss_ipv4_conn_cfg with |
| * i6cfgp.num_conn_valid, which holds the user input |
| */ |
| if (NSS_FAILURE == i6cfgp.response) { |
| /* |
| * Restore the current_value to its previous state |
| */ |
| nss_ipv6_conn_cfg = i6cfgp.current_value; |
| up(&i6cfgp.sem); |
| return NSS_FAILURE; |
| } |
| |
| up(&i6cfgp.sem); |
| return NSS_SUCCESS; |
| } |
| |
| static ctl_table nss_ipv6_table[] = { |
| { |
| .procname = "ipv6_conn", |
| .data = &nss_ipv6_conn_cfg, |
| .maxlen = sizeof(int), |
| .mode = 0644, |
| .proc_handler = &nss_ipv6_conn_cfg_handler, |
| }, |
| { } |
| }; |
| |
| static ctl_table nss_ipv6_dir[] = { |
| { |
| .procname = "ipv6cfg", |
| .mode = 0555, |
| .child = nss_ipv6_table, |
| }, |
| { } |
| }; |
| |
| static ctl_table nss_ipv6_root_dir[] = { |
| { |
| .procname = "nss", |
| .mode = 0555, |
| .child = nss_ipv6_dir, |
| }, |
| { } |
| }; |
| |
| static ctl_table nss_ipv6_root[] = { |
| { |
| .procname = "dev", |
| .mode = 0555, |
| .child = nss_ipv6_root_dir, |
| }, |
| { } |
| }; |
| |
| static struct ctl_table_header *nss_ipv6_header; |
| |
| /* |
| * nss_ipv6_register_sysctl() |
| * Register sysctl specific to ipv4 |
| */ |
| void nss_ipv6_register_sysctl(void) |
| { |
| /* |
| * Register sysctl table. |
| */ |
| nss_ipv6_header = register_sysctl_table(nss_ipv6_root); |
| sema_init(&i6cfgp.sem, 1); |
| init_completion(&i6cfgp.complete); |
| i6cfgp.current_value = nss_ipv6_conn_cfg; |
| } |
| |
| /* |
| * nss_ipv6_unregister_sysctl() |
| * Unregister sysctl specific to ipv4 |
| */ |
| void nss_ipv6_unregister_sysctl(void) |
| { |
| /* |
| * Unregister sysctl table. |
| */ |
| if (nss_ipv6_header) { |
| unregister_sysctl_table(nss_ipv6_header); |
| } |
| } |
| |
| /* |
| * nss_ipv6_msg_init() |
| * Initialize IPv6 message. |
| */ |
| void nss_ipv6_msg_init(struct nss_ipv6_msg *nim, uint16_t if_num, uint32_t type, uint32_t len, |
| nss_ipv6_msg_callback_t *cb, void *app_data) |
| { |
| nss_cmn_msg_init(&nim->cm, if_num, type, len, (void *)cb, app_data); |
| } |
| |
| 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); |
| EXPORT_SYMBOL(nss_ipv6_register_sysctl); |
| EXPORT_SYMBOL(nss_ipv6_unregister_sysctl); |
| EXPORT_SYMBOL(nss_ipv6_msg_init); |