| /* |
| **************************************************************************** |
| * Copyright (c) 2018, 2020-2021, 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_lag.h" |
| #include "nss_gre_redir_lag_ds_stats.h" |
| #include "nss_gre_redir_lag_ds_log.h" |
| #include "nss_gre_redir_lag_ds_strings.h" |
| |
| #define NSS_GRE_REDIR_LAG_DS_TX_TIMEOUT 3000 /* 3 Seconds */ |
| |
| struct nss_gre_redir_lag_ds_tun_stats tun_ds_stats[NSS_GRE_REDIR_LAG_MAX_NODE]; |
| |
| /* |
| * Private data structure |
| */ |
| static struct { |
| struct semaphore sem; |
| struct completion complete; |
| int response; |
| nss_gre_redir_lag_ds_msg_callback_t *cb; |
| void *app_data; |
| } nss_gre_redir_lag_ds_pvt; |
| |
| /* |
| * nss_gre_redir_lag_ds_callback() |
| * Callback to handle the completion of HLOS-->NSS messages. |
| */ |
| static void nss_gre_redir_lag_ds_callback(void *app_data, struct nss_gre_redir_lag_ds_msg *nim) |
| { |
| nss_gre_redir_lag_ds_msg_callback_t callback = (nss_gre_redir_lag_ds_msg_callback_t)nss_gre_redir_lag_ds_pvt.cb; |
| void *data = nss_gre_redir_lag_ds_pvt.app_data; |
| |
| nss_gre_redir_lag_ds_pvt.cb = NULL; |
| nss_gre_redir_lag_ds_pvt.app_data = NULL; |
| |
| if (nim->cm.response != NSS_CMN_RESPONSE_ACK) { |
| nss_warning("GRE LAG DS: error response %d\n", nim->cm.response); |
| nss_gre_redir_lag_ds_pvt.response = NSS_TX_FAILURE; |
| } else { |
| nss_gre_redir_lag_ds_pvt.response = NSS_TX_SUCCESS; |
| } |
| |
| if (callback) { |
| callback(data, &nim->cm); |
| } |
| |
| complete(&nss_gre_redir_lag_ds_pvt.complete); |
| } |
| |
| /* |
| * nss_gre_redir_lag_ds_get_node_idx() |
| * Returns index of statistics context. |
| */ |
| bool nss_gre_redir_lag_ds_get_node_idx(uint32_t ifnum, uint32_t *idx) |
| { |
| uint32_t node_idx; |
| for (node_idx = 0; node_idx < NSS_GRE_REDIR_LAG_MAX_NODE; node_idx++) { |
| if ((tun_ds_stats[node_idx].valid) && (tun_ds_stats[node_idx].ifnum == ifnum)) { |
| *idx = node_idx; |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| /* |
| * nss_gre_redir_lag_ds_verify_ifnum() |
| * Verify interface type. |
| */ |
| bool nss_gre_redir_lag_ds_verify_ifnum(uint32_t if_num) |
| { |
| return nss_dynamic_interface_get_type(nss_gre_redir_lag_ds_get_context(), if_num) == NSS_DYNAMIC_INTERFACE_TYPE_GRE_REDIR_LAG_DS; |
| } |
| |
| /* |
| * nss_gre_redir_lag_ds_handler() |
| * Handle NSS -> HLOS messages for gre tunnel |
| */ |
| static void nss_gre_redir_lag_ds_msg_handler(struct nss_ctx_instance *nss_ctx, struct nss_cmn_msg *ncm, __attribute__((unused))void *app_data) |
| { |
| void *ctx; |
| struct nss_gre_redir_lag_ds_msg *ngrm = (struct nss_gre_redir_lag_ds_msg *)ncm; |
| nss_gre_redir_lag_ds_msg_callback_t cb; |
| |
| /* |
| * Interface should be a dynamic interface of type NSS_DYNAMIC_INTERFACE_TYPE_GRE_REDIR_LAG_DS. |
| */ |
| BUG_ON(!nss_gre_redir_lag_ds_verify_ifnum(ncm->interface)); |
| |
| /* |
| * Is this a valid request/response packet? |
| */ |
| if (ncm->type >= NSS_GRE_REDIR_LAG_DS_MAX_MSG_TYPES) { |
| nss_warning("%px: received invalid message %d for gre interface\n", nss_ctx, ncm->type); |
| return; |
| } |
| |
| if (nss_cmn_get_msg_len(ncm) > sizeof(struct nss_gre_redir_lag_ds_msg)) { |
| nss_warning("%px: Length of message is greater than required: %d\n", nss_ctx, nss_cmn_get_msg_len(ncm)); |
| return; |
| } |
| |
| /* |
| * Update the callback and app_data for NOTIFY messages, gre sends all notify messages |
| * to the same callback/app_data. |
| */ |
| 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->nss_rx_interface_handlers[ncm->interface].app_data; |
| } |
| |
| /* |
| * Trace messages. |
| */ |
| nss_gre_redir_lag_ds_log_rx_msg(ngrm); |
| |
| /* |
| * Log failures |
| */ |
| nss_core_log_msg_failures(nss_ctx, ncm); |
| |
| switch (ncm->type) { |
| case NSS_GRE_REDIR_LAG_DS_STATS_SYNC_MSG: |
| nss_gre_redir_lag_ds_stats_sync(nss_ctx, &ngrm->msg.ds_sync_stats, ncm->interface); |
| nss_gre_redir_lag_ds_stats_notify(nss_ctx, ncm->interface); |
| break; |
| } |
| |
| /* |
| * Do we have a call back |
| */ |
| if (!ncm->cb) { |
| return; |
| } |
| |
| /* |
| * callback |
| */ |
| cb = (nss_gre_redir_lag_ds_msg_callback_t)ncm->cb; |
| ctx = (void *)ncm->app_data; |
| |
| /* |
| * call gre tunnel callback |
| */ |
| cb(ctx, ncm); |
| } |
| |
| /* |
| * nss_gre_redir_lag_ds_unregister_if() |
| * Unregister GRE redirect LAG downstream node. |
| */ |
| static enum nss_gre_redir_lag_err_types nss_gre_redir_lag_ds_unregister_if(uint32_t if_num) |
| { |
| struct nss_ctx_instance *nss_ctx __maybe_unused = nss_gre_redir_lag_ds_get_context(); |
| uint32_t idx, status; |
| |
| nss_assert(nss_ctx); |
| nss_assert(!nss_gre_redir_lag_ds_verify_ifnum(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_lag interface %d with NSS core\n", nss_ctx, if_num); |
| return NSS_GRE_REDIR_LAG_ERR_CORE_UNREGISTER_FAILED; |
| } |
| |
| status = nss_core_unregister_handler(nss_ctx, if_num); |
| if (status != NSS_CORE_STATUS_SUCCESS) { |
| nss_warning("%px: Not able to unregister handler for gre_lag interface %d with NSS core\n", nss_ctx, if_num); |
| return NSS_GRE_REDIR_LAG_ERR_CORE_UNREGISTER_FAILED; |
| } |
| |
| nss_core_unregister_subsys_dp(nss_ctx, if_num); |
| spin_lock_bh(&nss_gre_redir_lag_ds_stats_lock); |
| if (!nss_gre_redir_lag_ds_get_node_idx(if_num, &idx)) { |
| spin_unlock_bh(&nss_gre_redir_lag_ds_stats_lock); |
| nss_warning("%px: Stats context not found.\n", nss_ctx); |
| return NSS_GRE_REDIR_LAG_ERR_STATS_INDEX_NOT_FOUND; |
| } |
| |
| tun_ds_stats[idx].valid = false; |
| spin_unlock_bh(&nss_gre_redir_lag_ds_stats_lock); |
| return NSS_GRE_REDIR_LAG_SUCCESS; |
| } |
| |
| /* |
| * nss_gre_redir_lag_ds_register_if() |
| * Register GRE redirect LAG downstream node. |
| */ |
| static struct nss_ctx_instance *nss_gre_redir_lag_ds_register_if(uint32_t if_num, struct net_device *netdev, |
| nss_gre_redir_lag_ds_data_callback_t cb_func_data, |
| nss_gre_redir_lag_ds_msg_callback_t cb_func_msg, uint32_t features, uint32_t type, void *app_ctx) |
| { |
| struct nss_ctx_instance *nss_ctx = nss_gre_redir_lag_ds_get_context(); |
| uint32_t status, i; |
| nss_assert(nss_ctx); |
| nss_assert(!nss_gre_redir_lag_ds_verify_ifnum(if_num)); |
| |
| /* |
| * Registering handler for sending tunnel interface msgs to NSS. |
| */ |
| status = nss_core_register_handler(nss_ctx, if_num, nss_gre_redir_lag_ds_msg_handler, app_ctx); |
| if (status != NSS_CORE_STATUS_SUCCESS) { |
| nss_warning("%px: Not able to register handler for gre_lag interface %d with NSS core\n", nss_ctx, if_num); |
| return NULL; |
| } |
| |
| /* |
| * Registering handler for sending tunnel interface msgs to NSS. |
| */ |
| status = nss_core_register_msg_handler(nss_ctx, if_num, cb_func_msg); |
| if (status != NSS_CORE_STATUS_SUCCESS) { |
| nss_core_unregister_handler(nss_ctx, if_num); |
| nss_warning("%px: Not able to register handler for gre_lag interface %d with NSS core\n", nss_ctx, if_num); |
| return NULL; |
| } |
| |
| nss_core_register_subsys_dp(nss_ctx, if_num, cb_func_data, NULL, NULL, netdev, features); |
| nss_core_set_subsys_dp_type(nss_ctx, netdev, if_num, type); |
| spin_lock_bh(&nss_gre_redir_lag_ds_stats_lock); |
| for (i = 0; i < NSS_GRE_REDIR_LAG_MAX_NODE; i++) { |
| if (!tun_ds_stats[i].valid) { |
| tun_ds_stats[i].ifnum = if_num; |
| tun_ds_stats[i].valid = true; |
| break; |
| } |
| } |
| |
| spin_unlock_bh(&nss_gre_redir_lag_ds_stats_lock); |
| |
| return nss_ctx; |
| } |
| |
| /* |
| * nss_gre_redir_lag_ds_get_context() |
| * Retrieves context GRE redirect LAG downstream node. |
| */ |
| struct nss_ctx_instance *nss_gre_redir_lag_ds_get_context(void) |
| { |
| return (struct nss_ctx_instance *)&nss_top_main.nss[nss_top_main.gre_redir_lag_ds_handler_id]; |
| } |
| EXPORT_SYMBOL(nss_gre_redir_lag_ds_get_context); |
| |
| /* |
| * nss_gre_redir_lag_ds_tx_msg() |
| * Transmit a gre message to NSS. |
| */ |
| nss_tx_status_t nss_gre_redir_lag_ds_tx_msg(struct nss_ctx_instance *nss_ctx, struct nss_gre_redir_lag_ds_msg *msg) |
| { |
| struct nss_cmn_msg *ncm = &msg->cm; |
| |
| /* |
| * Trace messages. |
| */ |
| nss_gre_redir_lag_ds_log_tx_msg(msg); |
| |
| /* |
| * Sanity check the message. Interface should be a dynamic interface |
| * of type NSS_DYNAMIC_INTERFACE_TYPE_GRE_REDIR_LAG_DS. |
| */ |
| if (!nss_gre_redir_lag_ds_verify_ifnum(ncm->interface)) { |
| nss_warning("%px: tx request for another interface: %d\n", nss_ctx, ncm->interface); |
| return NSS_TX_FAILURE; |
| } |
| |
| if (ncm->type >= NSS_GRE_REDIR_LAG_DS_MAX_MSG_TYPES) { |
| nss_warning("%px: message type out of range: %d\n", 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_lag_ds_tx_msg); |
| |
| /* |
| * nss_gre_redir_lag_ds_tx_msg_sync() |
| * Transmit a GRE lag message to NSS firmware synchronously. |
| */ |
| nss_tx_status_t nss_gre_redir_lag_ds_tx_msg_sync(struct nss_ctx_instance *nss_ctx, struct nss_gre_redir_lag_ds_msg *ngrm) |
| { |
| nss_tx_status_t status; |
| int ret = 0; |
| |
| down(&nss_gre_redir_lag_ds_pvt.sem); |
| nss_gre_redir_lag_ds_pvt.cb = (void *)ngrm->cm.cb; |
| nss_gre_redir_lag_ds_pvt.app_data = (void *)ngrm->cm.app_data; |
| ngrm->cm.cb = (nss_ptr_t)nss_gre_redir_lag_ds_callback; |
| ngrm->cm.app_data = (nss_ptr_t)NULL; |
| |
| status = nss_gre_redir_lag_ds_tx_msg(nss_ctx, ngrm); |
| if (status != NSS_TX_SUCCESS) { |
| nss_warning("%px: GRE LAG DS msg tx failed\n", nss_ctx); |
| up(&nss_gre_redir_lag_ds_pvt.sem); |
| return status; |
| } |
| |
| ret = wait_for_completion_timeout(&nss_gre_redir_lag_ds_pvt.complete, msecs_to_jiffies(NSS_GRE_REDIR_LAG_DS_TX_TIMEOUT)); |
| if (!ret) { |
| nss_warning("%px: GRE LAG DS tx sync failed due to timeout\n", nss_ctx); |
| nss_gre_redir_lag_ds_pvt.response = NSS_TX_FAILURE; |
| } |
| |
| status = nss_gre_redir_lag_ds_pvt.response; |
| up(&nss_gre_redir_lag_ds_pvt.sem); |
| return status; |
| } |
| EXPORT_SYMBOL(nss_gre_redir_lag_ds_tx_msg_sync); |
| |
| /* |
| * nss_gre_redir_lag_ds_unregister_and_dealloc() |
| * Unregister and deallocate nss gre redirect LAG DS node. |
| */ |
| enum nss_gre_redir_lag_err_types nss_gre_redir_lag_ds_unregister_and_dealloc(uint32_t ifnum) |
| { |
| uint32_t ret; |
| struct nss_ctx_instance *nss_ctx __maybe_unused = nss_gre_redir_lag_ds_get_context(); |
| nss_tx_status_t status; |
| |
| if (!nss_gre_redir_lag_ds_verify_ifnum(ifnum)) { |
| nss_warning("%px: Unknown interface type %u.\n", nss_ctx, ifnum); |
| return NSS_GRE_REDIR_LAG_ERR_INCORRECT_IFNUM; |
| } |
| |
| ret = nss_gre_redir_lag_ds_unregister_if(ifnum); |
| if (ret) { |
| nss_warning("%px: Unable to unregister interface %u.\n", nss_ctx, ifnum); |
| return ret; |
| } |
| |
| status = nss_dynamic_interface_dealloc_node(ifnum, NSS_DYNAMIC_INTERFACE_TYPE_GRE_REDIR_LAG_DS); |
| if (status != NSS_TX_SUCCESS) { |
| nss_warning("%px: Unable to deallocate node %u\n", nss_ctx, ifnum); |
| return NSS_GRE_REDIR_LAG_ERR_DEALLOC_FAILED; |
| } |
| |
| return NSS_GRE_REDIR_LAG_SUCCESS; |
| } |
| EXPORT_SYMBOL(nss_gre_redir_lag_ds_unregister_and_dealloc); |
| |
| /* |
| * nss_gre_redir_lag_ds_alloc_and_register_node() |
| * Allocates and registers GRE downstream type dynamic nodes with NSS. |
| */ |
| int nss_gre_redir_lag_ds_alloc_and_register_node(struct net_device *dev, |
| nss_gre_redir_lag_ds_data_callback_t cb_func_data, |
| nss_gre_redir_lag_ds_msg_callback_t cb_func_msg, void *app_ctx) |
| { |
| int ifnum; |
| nss_tx_status_t status; |
| struct nss_ctx_instance *nss_ctx; |
| |
| ifnum = nss_dynamic_interface_alloc_node(NSS_DYNAMIC_INTERFACE_TYPE_GRE_REDIR_LAG_DS); |
| if (ifnum == -1) { |
| nss_warning("%px: Unable to allocate GRE_LAG node of type = %u\n", dev, NSS_DYNAMIC_INTERFACE_TYPE_GRE_REDIR_LAG_DS); |
| return -1; |
| } |
| |
| nss_ctx = nss_gre_redir_lag_ds_register_if(ifnum, dev, cb_func_data, |
| cb_func_msg, 0, NSS_DYNAMIC_INTERFACE_TYPE_GRE_REDIR_LAG_DS, app_ctx); |
| if (!nss_ctx) { |
| nss_warning("%px: Unable to register GRE_LAG node of type = %u\n", dev, NSS_DYNAMIC_INTERFACE_TYPE_GRE_REDIR_LAG_DS); |
| status = nss_dynamic_interface_dealloc_node(ifnum, NSS_DYNAMIC_INTERFACE_TYPE_GRE_REDIR_LAG_DS); |
| if (status != NSS_TX_SUCCESS) { |
| nss_warning("%px: Unable to deallocate node of type = %u.\n", dev, NSS_DYNAMIC_INTERFACE_TYPE_GRE_REDIR_LAG_DS); |
| } |
| |
| return -1; |
| } |
| |
| return ifnum; |
| } |
| EXPORT_SYMBOL(nss_gre_redir_lag_ds_alloc_and_register_node); |
| |
| /* |
| * nss_gre_redir_lag_ds_register_handler() |
| * Registering handler for sending msg to base gre_lag node on NSS. |
| */ |
| void nss_gre_redir_lag_ds_register_handler(void) |
| { |
| if (!nss_gre_redir_lag_ds_stats_dentry_create()) { |
| nss_warning(" Unable to create debugfs entry for LAG DS node.\n"); |
| return; |
| } |
| |
| nss_gre_redir_lag_ds_strings_dentry_create(); |
| nss_gre_redir_lag_ds_pvt.cb = NULL; |
| nss_gre_redir_lag_ds_pvt.app_data = NULL; |
| sema_init(&nss_gre_redir_lag_ds_pvt.sem, 1); |
| init_completion(&nss_gre_redir_lag_ds_pvt.complete); |
| } |