| /* |
| ************************************************************************** |
| * Copyright (c) 2019-2021, 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_gre_redir_mark_strings.h" |
| #include "nss_gre_redir_mark_stats.h" |
| #include "nss_gre_redir_mark_log.h" |
| #define NSS_GRE_REDIR_MARK_TX_TIMEOUT 3000 /* 3 Seconds */ |
| |
| /* |
| * Private data structure for handling synchronous messaging. |
| */ |
| static struct { |
| struct semaphore sem; |
| struct completion complete; |
| int response; |
| } nss_gre_redir_mark_pvt; |
| |
| /* |
| * nss_gre_redir_mark_msg_sync_callback() |
| * Callback to handle the completion of HLOS-->NSS messages. |
| */ |
| static void nss_gre_redir_mark_msg_sync_callback(void *app_data, struct nss_gre_redir_mark_msg *nim) |
| { |
| nss_gre_redir_mark_pvt.response = NSS_TX_SUCCESS; |
| if (nim->cm.response != NSS_CMN_RESPONSE_ACK) { |
| nss_warning("GRE mark Error response %d\n", nim->cm.response); |
| nss_gre_redir_mark_pvt.response = NSS_TX_FAILURE; |
| } |
| |
| complete(&nss_gre_redir_mark_pvt.complete); |
| } |
| |
| /* |
| * nss_gre_redir_mark_handler() |
| * Handle NSS to HLOS messages for GRE redir mark |
| */ |
| static void nss_gre_redir_mark_handler(struct nss_ctx_instance *nss_ctx, struct nss_cmn_msg *ncm, void *app_data) |
| { |
| struct nss_gre_redir_mark_msg *ngrm = (struct nss_gre_redir_mark_msg *)ncm; |
| nss_gre_redir_mark_msg_callback_t cb; |
| |
| NSS_VERIFY_CTX_MAGIC(nss_ctx); |
| |
| /* |
| * Is this a valid request/response packet? |
| */ |
| if (ncm->type >= NSS_GRE_REDIR_MARK_MSG_MAX) { |
| nss_warning("%px: received invalid message %d for GRE redir mark interface", nss_ctx, ncm->type); |
| return; |
| } |
| |
| if (nss_cmn_get_msg_len(ncm) > sizeof(struct nss_gre_redir_mark_msg)) { |
| nss_warning("%px: length of message is greater than required: %d", nss_ctx, nss_cmn_get_msg_len(ncm)); |
| return; |
| } |
| |
| /* |
| * Log failures |
| */ |
| nss_core_log_msg_failures(nss_ctx, ncm); |
| |
| /* |
| * Trace messages. |
| */ |
| nss_gre_redir_mark_log_rx_msg((struct nss_gre_redir_mark_msg *)ncm); |
| |
| if (ncm->type == NSS_GRE_REDIR_MARK_STATS_SYNC_MSG) { |
| nss_gre_redir_mark_stats_sync(nss_ctx, ncm->interface, &ngrm->msg.stats_sync); |
| nss_gre_redir_mark_stats_notify(nss_ctx, ncm->interface); |
| } |
| |
| /* |
| * Update the callback and app_data for NOTIFY messages, GRE redir mark sends all notify messages |
| * to the same callback/app_data. The app data here represent the netdevice of the GRE redir mark |
| * interface. |
| */ |
| 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; |
| } |
| |
| /* |
| * load and call the registered synchronous message callback. |
| */ |
| cb = (nss_gre_redir_mark_msg_callback_t)ncm->cb; |
| if (unlikely(!cb)) { |
| return; |
| } |
| |
| cb((void *)ncm->app_data, ncm); |
| } |
| |
| /* |
| * nss_gre_redir_mark_reg_cb() |
| * Configure a callback on VAP. |
| */ |
| nss_tx_status_t nss_gre_redir_mark_reg_cb(int ifnum, |
| struct nss_gre_redir_mark_register_cb_msg *ngrcm) |
| { |
| struct nss_gre_redir_mark_msg config; |
| struct nss_ctx_instance *nss_ctx __maybe_unused = nss_gre_redir_mark_get_context(); |
| nss_tx_status_t status; |
| uint32_t vap_type; |
| uint32_t len = sizeof(struct nss_gre_redir_mark_register_cb_msg); |
| |
| if (!nss_ctx) { |
| nss_warning("Unable to retrieve NSS context.\n"); |
| return NSS_TX_FAILURE_BAD_PARAM; |
| } |
| |
| vap_type = nss_dynamic_interface_get_type(nss_ctx, ngrcm->nss_if_num); |
| if ((vap_type != NSS_DYNAMIC_INTERFACE_TYPE_VAP)) { |
| nss_warning("%px: Incorrect type for vap interface type = %u", nss_ctx, vap_type); |
| return NSS_TX_FAILURE_BAD_PARAM; |
| } |
| |
| /* |
| * Configure the node |
| */ |
| nss_cmn_msg_init(&config.cm, NSS_GRE_REDIR_MARK_INTERFACE, NSS_GRE_REDIR_MARK_REG_CB_MSG, len, NULL, NULL); |
| config.msg.reg_cb_msg.nss_if_num = ngrcm->nss_if_num; |
| |
| status = nss_gre_redir_mark_tx_msg_sync(nss_ctx, &config); |
| if (status != NSS_TX_SUCCESS) { |
| nss_warning("%px: Unable to register callback from GRE redir mark interface %d\n", nss_ctx, ifnum); |
| } |
| |
| return status; |
| } |
| EXPORT_SYMBOL(nss_gre_redir_mark_reg_cb); |
| |
| /* |
| * nss_gre_redir_mark_tx_msg() |
| * Transmit a GRE MARK configuration message to NSS FW. |
| */ |
| nss_tx_status_t nss_gre_redir_mark_tx_msg(struct nss_ctx_instance *nss_ctx, struct nss_gre_redir_mark_msg *msg) |
| { |
| struct nss_cmn_msg *ncm = &msg->cm; |
| |
| /* |
| * Trace Messages |
| */ |
| nss_gre_redir_mark_log_tx_msg(msg); |
| |
| /* |
| * interface should be of type of redir mark |
| */ |
| if (ncm->interface != NSS_GRE_REDIR_MARK_INTERFACE) { |
| nss_warning("%px: tx request for another interface: %d", nss_ctx, ncm->interface); |
| return NSS_TX_FAILURE; |
| } |
| |
| if (ncm->type >= NSS_GRE_REDIR_MARK_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_gre_redir_mark_tx_msg); |
| |
| /* |
| * nss_gre_redir_mark_tx_msg_sync() |
| * Transmit a GRE redir mark message to NSS firmware synchronously. |
| */ |
| nss_tx_status_t nss_gre_redir_mark_tx_msg_sync(struct nss_ctx_instance *nss_ctx, struct nss_gre_redir_mark_msg *ngrm) |
| { |
| nss_tx_status_t status; |
| int ret = 0; |
| |
| /* |
| * Decrease the semaphore count to send the message exclusively. |
| */ |
| down(&nss_gre_redir_mark_pvt.sem); |
| ngrm->cm.cb = (nss_ptr_t)nss_gre_redir_mark_msg_sync_callback; |
| ngrm->cm.app_data = (nss_ptr_t)NULL; |
| status = nss_gre_redir_mark_tx_msg(nss_ctx, ngrm); |
| if (status != NSS_TX_SUCCESS) { |
| nss_warning("%px: GRE redir mark tx_msg failed\n", nss_ctx); |
| up(&nss_gre_redir_mark_pvt.sem); |
| return status; |
| } |
| |
| ret = wait_for_completion_timeout(&nss_gre_redir_mark_pvt.complete, msecs_to_jiffies(NSS_GRE_REDIR_MARK_TX_TIMEOUT)); |
| if (!ret) { |
| nss_warning("%px: GRE redir mark message tx sync failed due to timeout\n", nss_ctx); |
| nss_gre_redir_mark_pvt.response = NSS_TX_FAILURE; |
| } |
| |
| status = nss_gre_redir_mark_pvt.response; |
| up(&nss_gre_redir_mark_pvt.sem); |
| return status; |
| } |
| EXPORT_SYMBOL(nss_gre_redir_mark_tx_msg_sync); |
| |
| /* |
| * nss_gre_redir_mark_tx_buf() |
| * Send packet to GRE redir mark interface owned by NSS. |
| */ |
| nss_tx_status_t nss_gre_redir_mark_tx_buf(struct nss_ctx_instance *nss_ctx, struct sk_buff *os_buf, uint32_t if_num) |
| { |
| nss_trace("%px: GRE redir mark If Tx packet, interface id:%d, data=%px", nss_ctx, if_num, os_buf->data); |
| |
| /* |
| * We expect Tx packets to the GRE redir mark interface only. |
| */ |
| if (if_num != NSS_GRE_REDIR_MARK_INTERFACE) { |
| nss_warning("%px: Invalid interface:%d for GRE redir mark packets\n", nss_ctx, if_num); |
| return NSS_TX_FAILURE_BAD_PARAM; |
| } |
| |
| return nss_core_send_packet(nss_ctx, os_buf, if_num, 0); |
| } |
| EXPORT_SYMBOL(nss_gre_redir_mark_tx_buf); |
| |
| /* |
| * nss_gre_redir_mark_get_context() |
| * Return NSS GRE redir mark context. |
| */ |
| struct nss_ctx_instance *nss_gre_redir_mark_get_context(void) |
| { |
| return &nss_top_main.nss[nss_top_main.gre_redir_mark_handler_id]; |
| } |
| EXPORT_SYMBOL(nss_gre_redir_mark_get_context); |
| |
| /* |
| * nss_gre_redir_mark_unregister_if() |
| * Unregister dynamic node for GRE_REDIR_MARK redir. |
| */ |
| bool nss_gre_redir_mark_unregister_if(uint32_t if_num) |
| { |
| struct nss_ctx_instance *nss_ctx __maybe_unused = (struct nss_ctx_instance *)&nss_top_main.nss[nss_top_main.gre_redir_handler_id]; |
| struct net_device *dev; |
| uint32_t status; |
| |
| nss_assert(nss_ctx); |
| nss_assert(if_num == NSS_GRE_REDIR_MARK_INTERFACE); |
| |
| dev = nss_cmn_get_interface_dev(nss_ctx, if_num); |
| |
| BUG_ON(!dev); |
| |
| nss_core_unregister_subsys_dp(nss_ctx, if_num); |
| status = nss_core_unregister_msg_handler(nss_ctx, if_num); |
| if (status != NSS_CORE_STATUS_SUCCESS) { |
| nss_warning("%px: Not able to unregister handler for gre_redir_mark interface %d with NSS core\n", |
| nss_ctx, if_num); |
| return false; |
| } |
| |
| nss_ctx->nss_rx_interface_handlers[if_num].msg_cb = NULL; |
| return true; |
| } |
| EXPORT_SYMBOL(nss_gre_redir_mark_unregister_if); |
| |
| /* |
| * nss_gre_redir_mark_register_if() |
| * Register staticr GRE redir mark interface with data-plane. |
| */ |
| struct nss_ctx_instance *nss_gre_redir_mark_register_if(struct net_device *netdev, uint32_t if_num, |
| nss_gre_redir_mark_data_callback_t cb_func_data, nss_gre_redir_mark_msg_callback_t cb_func_msg, |
| uint32_t features) |
| { |
| struct nss_ctx_instance *nss_ctx = (struct nss_ctx_instance *)&nss_top_main.nss[nss_top_main.gre_redir_handler_id]; |
| uint32_t status; |
| |
| nss_assert(nss_ctx); |
| nss_assert(if_num == NSS_GRE_REDIR_MARK_INTERFACE); |
| |
| /* |
| * Registering the interface with network data path. |
| */ |
| nss_core_register_subsys_dp(nss_ctx, if_num, cb_func_data, NULL, NULL, netdev, features); |
| status = nss_core_register_msg_handler(nss_ctx, NSS_GRE_REDIR_MARK_INTERFACE, cb_func_msg); |
| if (status != NSS_CORE_STATUS_SUCCESS) { |
| nss_warning("%px: Not able to register handler for gre_redir_mark interface %d with NSS core\n", |
| nss_ctx, if_num); |
| return NULL; |
| } |
| |
| return nss_ctx; |
| } |
| EXPORT_SYMBOL(nss_gre_redir_mark_register_if); |
| |
| /* |
| * nss_gre_redir_mark_get_device() |
| * Gets the original device from probe. |
| */ |
| struct device *nss_gre_redir_mark_get_device(void) |
| { |
| struct nss_ctx_instance *nss_ctx = nss_gre_redir_mark_get_context(); |
| return nss_ctx->dev; |
| } |
| EXPORT_SYMBOL(nss_gre_redir_mark_get_device); |
| |
| /* |
| * nss_gre_redir_mark_register_handler() |
| * Register GRE redir mark and register handler |
| */ |
| void nss_gre_redir_mark_register_handler(void) |
| { |
| struct nss_ctx_instance *nss_ctx = nss_gre_redir_mark_get_context(); |
| struct dentry *gre_redir_mark_dentry = NULL; |
| uint32_t status = NSS_CORE_STATUS_FAILURE; |
| |
| /* |
| * Create the debug fs entry for the stats. |
| */ |
| gre_redir_mark_dentry = nss_gre_redir_mark_stats_dentry_create(); |
| if (!gre_redir_mark_dentry) { |
| nss_warning("%px: Not able to create debugfs entry\n", nss_ctx); |
| return; |
| } |
| |
| nss_gre_redir_mark_strings_dentry_create(); |
| sema_init(&nss_gre_redir_mark_pvt.sem, 1); |
| init_completion(&nss_gre_redir_mark_pvt.complete); |
| |
| nss_info("nss_gre_redir_mark_register_handler\n"); |
| status = nss_core_register_handler(nss_ctx, NSS_GRE_REDIR_MARK_INTERFACE, nss_gre_redir_mark_handler, NULL); |
| if (status != NSS_CORE_STATUS_SUCCESS) { |
| debugfs_remove_recursive(gre_redir_mark_dentry); |
| gre_redir_mark_dentry = NULL; |
| nss_warning("%px: Not able to register handler for GRE redir mark with NSS core\n", nss_ctx); |
| return; |
| } |
| } |